31329956 has 24 divisors (see below), whose sum is σ = 65385600. Its totient is φ = 12843072.

The previous prime is 31329941. The next prime is 31329967. The reversal of 31329956 is 65992313.

It is a super-2 number, since 2×31329956² = 1963132285923872, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 23681 + ... + 24968.

It is an arithmetic number, because the mean of its divisors is an integer number (2724400).

Almost surely, 2^31329956 is an apocalyptic number.

It is an amenable number.

31329956 is an abundant number, since it is smaller than the sum of its proper divisors (34055644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31329956 is a wasteful number, since it uses less digits than its factorization.

31329956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48683 (or 48681 counting only the distinct ones).

The product of its digits is 43740, while the sum is 38.

The square root of 31329956 is about 5597.3168572094. The cubic root of 31329956 is about 315.2486690160.

The spelling of 31329956 in words is "thirty-one million, three hundred twenty-nine thousand, nine hundred fifty-six".