31330986 has 16 divisors (see below), whose sum is σ = 62791200. Its totient is φ = 10422128.

The previous prime is 31330979. The next prime is 31330993. The reversal of 31330986 is 68903313.

It is an interprime number because it is at equal distance from previous prime (31330979) and next prime (31330993).

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, 2076 + ... + 8183.

It is an arithmetic number, because the mean of its divisors is an integer number (3924450).

Almost surely, 2^31330986 is an apocalyptic number.

31330986 is an abundant number, since it is smaller than the sum of its proper divisors (31460214).

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

31330986 is a wasteful number, since it uses less digits than its factorization.

31330986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10773.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 31330986 is about 5597.4088648231. The cubic root of 31330986 is about 315.2521236710.

The spelling of 31330986 in words is "thirty-one million, three hundred thirty thousand, nine hundred eighty-six".