31621096 has 16 divisors (see below), whose sum is σ = 63850500. Its totient is φ = 14594304.

The previous prime is 31621081. The next prime is 31621097. The reversal of 31621096 is 69012613.

It can be written as a sum of positive squares in 2 ways, for example, as 31472100 + 148996 = 5610^2 + 386^2 .

It is not an unprimeable number, because it can be changed into a prime (31621097) 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, 151921 + ... + 152128.

Almost surely, 2^31621096 is an apocalyptic number.

It is an amenable number.

31621096 is an abundant number, since it is smaller than the sum of its proper divisors (32229404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31621096 is a wasteful number, since it uses less digits than its factorization.

31621096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304068 (or 304064 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 31621096 is about 5623.2638209495. The cubic root of 31621096 is about 316.2221639120. Note that the first 3 decimals are identical.

It can be divided in two parts, 316 and 21096, that added together give a palindrome (21412).

The spelling of 31621096 in words is "thirty-one million, six hundred twenty-one thousand, ninety-six".