31421604 has 12 divisors (see below), whose sum is σ = 73317104. Its totient is φ = 10473864.

The previous prime is 31421597. The next prime is 31421617. The reversal of 31421604 is 40612413.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1309222 + ... + 1309245.

Almost surely, 2^31421604 is an apocalyptic number.

It is an amenable number.

31421604 is an abundant number, since it is smaller than the sum of its proper divisors (41895500).

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

31421604 is a wasteful number, since it uses less digits than its factorization.

31421604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618474 (or 2618472 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 31421604 is about 5605.4976585491. The cubic root of 31421604 is about 315.5557636454. Note that the first 3 decimals are identical.

The spelling of 31421604 in words is "thirty-one million, four hundred twenty-one thousand, six hundred four".