1515172992 has 64 divisors (see below), whose sum is σ = 4056499200. Its totient is φ = 501064704.

The previous prime is 1515172973. The next prime is 1515173003. The reversal of 1515172992 is 2992715151.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33234 + ... + 64302.

It is an arithmetic number, because the mean of its divisors is an integer number (63382800).

Almost surely, 2^1515172992 is an apocalyptic number.

1515172992 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 1515172992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2028249600).

1515172992 is an abundant number, since it is smaller than the sum of its proper divisors (2541326208).

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

1515172992 is a wasteful number, since it uses less digits than its factorization.

1515172992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31213 (or 31201 counting only the distinct ones).

The product of its digits is 56700, while the sum is 42.

The square root of 1515172992 is about 38925.2230822124. The cubic root of 1515172992 is about 1148.5610210968.

The spelling of 1515172992 in words is "one billion, five hundred fifteen million, one hundred seventy-two thousand, nine hundred ninety-two".