15031115172 has 72 divisors (see below), whose sum is σ = 39058358976. Its totient is φ = 4870442304.

The previous prime is 15031115161. The next prime is 15031115179. The reversal of 15031115172 is 27151113051.

15031115172 is a `hidden beast` number, since 1 + 503 + 1 + 1 + 151 + 7 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (15031115179) 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, 1624423 + ... + 1633649.

It is an arithmetic number, because the mean of its divisors is an integer number (542477208).

Almost surely, 2^15031115172 is an apocalyptic number.

15031115172 is a gapful number since it is divisible by the number (12) 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 15031115172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19529179488).

15031115172 is an abundant number, since it is smaller than the sum of its proper divisors (24027243804).

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

15031115172 is a wasteful number, since it uses less digits than its factorization.

15031115172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10497 (or 10492 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 27.

The spelling of 15031115172 in words is "fifteen billion, thirty-one million, one hundred fifteen thousand, one hundred seventy-two".