31172468399361 has 15 divisors (see below), whose sum is σ = 46566355018161. Its totient is φ = 20781612100188.

The previous prime is 31172468399351. The next prime is 31172468399419. The reversal of 31172468399361 is 16399386427113.

It is a happy number.

The square root of 31172468399361 is 5583231.

It is a perfect power (a square), and thus also a powerful number.

31172468399361 is a `hidden beast` number, since 3 + 1 + 1 + 72 + 46 + 83 + 99 + 361 = 666.

It is not a de Polignac number, because 31172468399361 - 2⁵ = 31172468399329 is a prime.

It is a super-2 number, since 2×31172468399361² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31172468399321) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 49938900 + ... + 50559258.

Almost surely, 2^{31172468399361} is an apocalyptic number.

31172468399361 is the 5583231-st square number.

31172468399361 is the 2791616-th centered octagonal number.

It is an amenable number.

31172468399361 is a deficient number, since it is larger than the sum of its proper divisors (15393886618800).

31172468399361 is an frugal number, since it uses more digits than its factorization.

31172468399361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240730 (or 620362 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 63.

The spelling of 31172468399361 in words is "thirty-one trillion, one hundred seventy-two billion, four hundred sixty-eight million, three hundred ninety-nine thousand, three hundred sixty-one".