31142956 has 12 divisors (see below), whose sum is σ = 58692592. Its totient is φ = 14373648.

The previous prime is 31142953. The next prime is 31142981. The reversal of 31142956 is 65924113.

It is not an unprimeable number, because it can be changed into a prime (31142953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299400 + ... + 299503.

Almost surely, 2^31142956 is an apocalyptic number.

It is an amenable number.

31142956 is a deficient number, since it is larger than the sum of its proper divisors (27549636).

31142956 is a wasteful number, since it uses less digits than its factorization.

31142956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598920 (or 598918 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 31142956 is about 5580.5874242771. The cubic root of 31142956 is about 314.6202057429.

The spelling of 31142956 in words is "thirty-one million, one hundred forty-two thousand, nine hundred fifty-six".