31343992 has 16 divisors (see below), whose sum is σ = 58829400. Its totient is φ = 15656160.

The previous prime is 31343989. The next prime is 31343993. The reversal of 31343992 is 29934313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31343993) 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, 14434 + ... + 16462.

Almost surely, 2^31343992 is an apocalyptic number.

It is an amenable number.

31343992 is a deficient number, since it is larger than the sum of its proper divisors (27485408).

31343992 is a wasteful number, since it uses less digits than its factorization.

31343992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3966 (or 3962 counting only the distinct ones).

The product of its digits is 17496, while the sum is 34.

The square root of 31343992 is about 5598.5705318411. The cubic root of 31343992 is about 315.2957397247.

The spelling of 31343992 in words is "thirty-one million, three hundred forty-three thousand, nine hundred ninety-two".