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15130005550 = 2521173376837
BaseRepresentation
bin11100001011101000…
…11001000000101110
31110001102202220202221
432011310121000232
5221441240134200
610541200305554
71043635632232
oct160564310056
943042686687
1015130005550
116464548120
122b230122ba
13157176720a
14a375c65c2
155d844491a
hex385d1902e

15130005550 has 48 divisors (see below), whose sum is σ = 31120789392. Its totient is φ = 5426438400.

The previous prime is 15130005493. The next prime is 15130005557. The reversal of 15130005550 is 5550003151.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15130005557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148269 + ... + 228568.

It is an arithmetic number, because the mean of its divisors is an integer number (648349779).

Almost surely, 215130005550 is an apocalyptic number.

15130005550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15130005550 is an abundant number, since it is smaller than the sum of its proper divisors (15990783842).

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

15130005550 is a wasteful number, since it uses less digits than its factorization.

15130005550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376933 (or 376928 counting only the distinct ones).

The product of its (nonzero) digits is 1875, while the sum is 25.

The spelling of 15130005550 in words is "fifteen billion, one hundred thirty million, five thousand, five hundred fifty".

Divisors: 1 2 5 10 11 22 25 50 55 73 110 146 275 365 550 730 803 1606 1825 3650 4015 8030 20075 40150 376837 753674 1884185 3768370 4145207 8290414 9420925 18841850 20726035 27509101 41452070 55018202 103630175 137545505 207260350 275091010 302600111 605200222 687727525 1375455050 1513000555 3026001110 7565002775 15130005550