31382681 has 12 divisors (see below), whose sum is σ = 34633200. Its totient is φ = 28415640.

The previous prime is 31382677. The next prime is 31382693. The reversal of 31382681 is 18628313.

It is a happy number.

It is not a de Polignac number, because 31382681 - 2² = 31382677 is a prime.

It is a super-2 number, since 2×31382681² = 1969745333495522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31382381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50390 + ... + 51008.

It is an arithmetic number, because the mean of its divisors is an integer number (2886100).

Almost surely, 2^31382681 is an apocalyptic number.

It is an amenable number.

31382681 is a deficient number, since it is larger than the sum of its proper divisors (3250519).

31382681 is a wasteful number, since it uses less digits than its factorization.

31382681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060 (or 1049 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 31382681 is about 5602.0247232585. The cubic root of 31382681 is about 315.4254132871.

The spelling of 31382681 in words is "thirty-one million, three hundred eighty-two thousand, six hundred eighty-one".