15131012100 has 72 divisors (see below), whose sum is σ = 43807508640. Its totient is φ = 4032314880.

The previous prime is 15131012087. The next prime is 15131012111. The reversal of 15131012100 is 121013151.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 15131012100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 470124 + ... + 501276.

It is an arithmetic number, because the mean of its divisors is an integer number (608437620).

Almost surely, 2^15131012100 is an apocalyptic number.

15131012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15131012100 is an abundant number, since it is smaller than the sum of its proper divisors (28676496540).

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

15131012100 is a wasteful number, since it uses less digits than its factorization.

15131012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32789 (or 32782 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 15.

Adding to 15131012100 its reverse (121013151), we get a palindrome (15252025251).

The spelling of 15131012100 in words is "fifteen billion, one hundred thirty-one million, twelve thousand, one hundred".