31379312 has 20 divisors (see below), whose sum is σ = 61532520. Its totient is φ = 15499968.

The previous prime is 31379303. The next prime is 31379321. The reversal of 31379312 is 21397313.

It is an interprime number because it is at equal distance from previous prime (31379303) and next prime (31379321).

It is a super-2 number, since 2×31379312² = 1969322443186688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10487 + ... + 13142.

It is an arithmetic number, because the mean of its divisors is an integer number (3076626).

Almost surely, 2^31379312 is an apocalyptic number.

It is an amenable number.

31379312 is a deficient number, since it is larger than the sum of its proper divisors (30153208).

31379312 is a wasteful number, since it uses less digits than its factorization.

31379312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23720 (or 23714 counting only the distinct ones).

The product of its digits is 3402, while the sum is 29.

The square root of 31379312 is about 5601.7240203352. The cubic root of 31379312 is about 315.4141256787.

The spelling of 31379312 in words is "thirty-one million, three hundred seventy-nine thousand, three hundred twelve".