31712481 has 12 divisors (see below), whose sum is σ = 45862180. Its totient is φ = 21116160.

The previous prime is 31712459. The next prime is 31712489. The reversal of 31712481 is 18421713.

It can be written as a sum of positive squares in 2 ways, for example, as 810000 + 30902481 = 900^2 + 5559^2 .

It is not a de Polignac number, because 31712481 - 2⁵ = 31712449 is a prime.

It is a super-2 number, since 2×31712481² = 2011362902350722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31712489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8601 + ... + 11721.

Almost surely, 2^31712481 is an apocalyptic number.

It is an amenable number.

31712481 is a deficient number, since it is larger than the sum of its proper divisors (14149699).

31712481 is a wasteful number, since it uses less digits than its factorization.

31712481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4256 (or 4253 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 31712481 is about 5631.3835777720. The cubic root of 31712481 is about 316.5264983841.

The spelling of 31712481 in words is "thirty-one million, seven hundred twelve thousand, four hundred eighty-one".