961515172 has 24 divisors (see below), whose sum is σ = 1783215000. Its totient is φ = 452075520.

The previous prime is 961515169. The next prime is 961515179. The reversal of 961515172 is 271515169.

It can be written as a sum of positive squares in 4 ways, for example, as 55264356 + 906250816 = 7434^2 + 30104^2 .

It is a super-2 number, since 2×961515172² = 1849022851972379168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (961515179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79272 + ... + 90592.

It is an arithmetic number, because the mean of its divisors is an integer number (74300625).

Almost surely, 2^961515172 is an apocalyptic number.

It is an amenable number.

961515172 is a deficient number, since it is larger than the sum of its proper divisors (821699828).

961515172 is a wasteful number, since it uses less digits than its factorization.

961515172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12591 (or 12589 counting only the distinct ones).

The product of its digits is 18900, while the sum is 37.

The square root of 961515172 is about 31008.3081125043. The cubic root of 961515172 is about 987.0035479685.

The spelling of 961515172 in words is "nine hundred sixty-one million, five hundred fifteen thousand, one hundred seventy-two".