31861996 has 6 divisors (see below), whose sum is σ = 55758500. Its totient is φ = 15930996.

The previous prime is 31861967. The next prime is 31862023. The reversal of 31861996 is 69916813.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3982746 + ... + 3982753.

Almost surely, 2^31861996 is an apocalyptic number.

It is an amenable number.

31861996 is a deficient number, since it is larger than the sum of its proper divisors (23896504).

31861996 is a wasteful number, since it uses less digits than its factorization.

31861996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7965503 (or 7965501 counting only the distinct ones).

The product of its digits is 69984, while the sum is 43.

The square root of 31861996 is about 5644.6431242374. The cubic root of 31861996 is about 317.0231617053.

The spelling of 31861996 in words is "thirty-one million, eight hundred sixty-one thousand, nine hundred ninety-six".