31621948 has 12 divisors (see below), whose sum is σ = 57246840. Its totient is φ = 15265712.

The previous prime is 31621901. The next prime is 31621949. The reversal of 31621948 is 84912613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31621949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136186 + ... + 136417.

It is an arithmetic number, because the mean of its divisors is an integer number (4770570).

Almost surely, 2^31621948 is an apocalyptic number.

It is an amenable number.

31621948 is a deficient number, since it is larger than the sum of its proper divisors (25624892).

31621948 is a wasteful number, since it uses less digits than its factorization.

31621948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272636 (or 272634 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 31621948 is about 5623.3395771552. The cubic root of 31621948 is about 316.2250039871.

The spelling of 31621948 in words is "thirty-one million, six hundred twenty-one thousand, nine hundred forty-eight".