31956133 has 12 divisors (see below), whose sum is σ = 36033984. Its totient is φ = 28104600.

The previous prime is 31956109. The next prime is 31956137. The reversal of 31956133 is 33165913.

It is not a de Polignac number, because 31956133 - 2⁵ = 31956101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31956095 and 31956104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31956137) 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, 9060 + ... + 12082.

It is an arithmetic number, because the mean of its divisors is an integer number (3002832).

Almost surely, 2^31956133 is an apocalyptic number.

It is an amenable number.

31956133 is a deficient number, since it is larger than the sum of its proper divisors (4077851).

31956133 is a wasteful number, since it uses less digits than its factorization.

31956133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3096 (or 3065 counting only the distinct ones).

The product of its digits is 7290, while the sum is 31.

The square root of 31956133 is about 5652.9755881306. The cubic root of 31956133 is about 317.3350721321.

The spelling of 31956133 in words is "thirty-one million, nine hundred fifty-six thousand, one hundred thirty-three".