Search a number
-
+
55500500 = 22531110091
BaseRepresentation
bin1101001110110…
…1111011010100
310212102201101002
43103231323110
5103202004000
65301322432
71242514016
oct323557324
9125381332
1055500500
1129368390
1216706418
13b662c43
14752a1b6
154d148d5
hex34eded4

55500500 has 48 divisors (see below), whose sum is σ = 132245568. Its totient is φ = 20180000.

The previous prime is 55500499. The next prime is 55500527. The reversal of 55500500 is 500555.

It is a happy number.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455 + ... + 10545.

It is an arithmetic number, because the mean of its divisors is an integer number (2755116).

Almost surely, 255500500 is an apocalyptic number.

55500500 is a gapful number since it is divisible by the number (50) 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 55500500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66122784).

55500500 is an abundant number, since it is smaller than the sum of its proper divisors (76745068).

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

55500500 is a wasteful number, since it uses less digits than its factorization.

55500500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10121 (or 10109 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 20.

The square root of 55500500 is about 7449.8657706029. The cubic root of 55500500 is about 381.4453267672.

Subtracting from 55500500 its reverse (500555), we obtain a palindrome (54999945).

The spelling of 55500500 in words is "fifty-five million, five hundred thousand, five hundred".

Divisors: 1 2 4 5 10 11 20 22 25 44 50 55 100 110 125 220 250 275 500 550 1100 1375 2750 5500 10091 20182 40364 50455 100910 111001 201820 222002 252275 444004 504550 555005 1009100 1110010 1261375 2220020 2522750 2775025 5045500 5550050 11100100 13875125 27750250 55500500