31920854 has 12 divisors (see below), whose sum is σ = 55698804. Its totient is φ = 13680324.

The previous prime is 31920841. The next prime is 31920859. The reversal of 31920854 is 45802913.

It is a self number, because there is not a number n which added to its sum of digits gives 31920854.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31920859) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 162764 + ... + 162959.

It is an arithmetic number, because the mean of its divisors is an integer number (4641567).

Almost surely, 2^31920854 is an apocalyptic number.

31920854 is a deficient number, since it is larger than the sum of its proper divisors (23777950).

31920854 is a wasteful number, since it uses less digits than its factorization.

31920854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325739 (or 325732 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 31920854 is about 5649.8543344054. The cubic root of 31920854 is about 317.2182517153.

The spelling of 31920854 in words is "thirty-one million, nine hundred twenty thousand, eight hundred fifty-four".