31312974 has 32 divisors (see below), whose sum is σ = 78080256. Its totient is φ = 8133120.

The previous prime is 31312973. The next prime is 31312999. The reversal of 31312974 is 47921313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33427 + ... + 34350.

It is an arithmetic number, because the mean of its divisors is an integer number (2440008).

Almost surely, 2^31312974 is an apocalyptic number.

31312974 is an abundant number, since it is smaller than the sum of its proper divisors (46767282).

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

31312974 is a wasteful number, since it uses less digits than its factorization.

31312974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67800.

The product of its digits is 4536, while the sum is 30.

The square root of 31312974 is about 5595.7996747561. The cubic root of 31312974 is about 315.1916998918.

It can be divided in two parts, 3131 and 2974, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 31312974 in words is "thirty-one million, three hundred twelve thousand, nine hundred seventy-four".