31312056 has 16 divisors (see below), whose sum is σ = 78280200. Its totient is φ = 10437344.

The previous prime is 31312051. The next prime is 31312081. The reversal of 31312056 is 65021313.

It is a super-3 number, since 3×31312056³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652311 + ... + 652358.

Almost surely, 2^31312056 is an apocalyptic number.

It is an amenable number.

31312056 is an abundant number, since it is smaller than the sum of its proper divisors (46968144).

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

31312056 is a wasteful number, since it uses less digits than its factorization.

31312056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304678 (or 1304674 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 31312056 is about 5595.7176483450. The cubic root of 31312056 is about 315.1886197116.

Adding to 31312056 its reverse (65021313), we get a palindrome (96333369).

The spelling of 31312056 in words is "thirty-one million, three hundred twelve thousand, fifty-six".