31621954 has 24 divisors (see below), whose sum is σ = 59423868. Its totient is φ = 12509280.

The previous prime is 31621949. The next prime is 31621957. The reversal of 31621954 is 45912613.

It can be written as a sum of positive squares in 2 ways, for example, as 26759929 + 4862025 = 5173^2 + 2205^2 .

It is not an unprimeable number, because it can be changed into a prime (31621957) 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, 11137 + ... + 13684.

Almost surely, 2^31621954 is an apocalyptic number.

31621954 is a deficient number, since it is larger than the sum of its proper divisors (27801914).

31621954 is a wasteful number, since it uses less digits than its factorization.

31621954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24850 (or 24843 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 31621954 is about 5623.3401106460. The cubic root of 31621954 is about 316.2250239874.

The spelling of 31621954 in words is "thirty-one million, six hundred twenty-one thousand, nine hundred fifty-four".