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1005500000 = 25562011
BaseRepresentation
bin111011111011101…
…011011001100000
32121002000200200202
4323323223121200
54024402000000
6243435204332
733626415611
oct7373533140
92532020622
101005500000
1147664003a
122408a66a8
1313041471b
149777dc08
155d41add5
hex3beeb660

1005500000 has 84 divisors (see below), whose sum is σ = 2475671436. Its totient is φ = 402000000.

The previous prime is 1005499997. The next prime is 1005500053. The reversal of 1005500000 is 55001.

It is a super-2 number, since 2×10055000002 = 2022060500000000000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (11) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 498995 + ... + 501005.

It is an arithmetic number, because the mean of its divisors is an integer number (29472279).

Almost surely, 21005500000 is an apocalyptic number.

1005500000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1005500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1237835718).

1005500000 is an abundant number, since it is smaller than the sum of its proper divisors (1470171436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1005500000 is an frugal number, since it uses more digits than its factorization.

1005500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051 (or 2018 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 11.

The square root of 1005500000 is about 31709.6199914159. The cubic root of 1005500000 is about 1001.8299824548.

Adding to 1005500000 its reverse (55001), we get a palindrome (1005555001).

The spelling of 1005500000 in words is "one billion, five million, five hundred thousand".

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 80 100 125 160 200 250 400 500 625 800 1000 1250 2000 2011 2500 3125 4000 4022 5000 6250 8044 10000 10055 12500 15625 16088 20000 20110 25000 31250 32176 40220 50000 50275 62500 64352 80440 100000 100550 125000 160880 201100 250000 251375 321760 402200 500000 502750 804400 1005500 1256875 1608800 2011000 2513750 4022000 5027500 6284375 8044000 10055000 12568750 20110000 25137500 31421875 40220000 50275000 62843750 100550000 125687500 201100000 251375000 502750000 1005500000