31814372 has 6 divisors (see below), whose sum is σ = 55675158. Its totient is φ = 15907184.

The previous prime is 31814357. The next prime is 31814383. The reversal of 31814372 is 27341813.

It can be written as a sum of positive squares in only one way, i.e., 27709696 + 4104676 = 5264^2 + 2026^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3976793 + ... + 3976800.

It is an arithmetic number, because the mean of its divisors is an integer number (9279193).

Almost surely, 2^31814372 is an apocalyptic number.

It is an amenable number.

31814372 is a deficient number, since it is larger than the sum of its proper divisors (23860786).

31814372 is a wasteful number, since it uses less digits than its factorization.

31814372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7953597 (or 7953595 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 31814372 is about 5640.4230337804. The cubic root of 31814372 is about 316.8651318530.

It can be divided in two parts, 318143 and 72, that multiplied together give a triangular number (22906296 = T₆₇₆₈).

The spelling of 31814372 in words is "thirty-one million, eight hundred fourteen thousand, three hundred seventy-two".