31421764 has 18 divisors (see below), whose sum is σ = 60442382. Its totient is φ = 14282400.

The previous prime is 31421759. The next prime is 31421783. The reversal of 31421764 is 46712413.

It can be written as a sum of positive squares in only one way, i.e., 18404100 + 13017664 = 4290^2 + 3608^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31977 + ... + 32944.

Almost surely, 2^31421764 is an apocalyptic number.

It is an amenable number.

31421764 is a deficient number, since it is larger than the sum of its proper divisors (29020618).

31421764 is a wasteful number, since it uses less digits than its factorization.

31421764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64947 (or 64934 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 31421764 is about 5605.5119302344. The cubic root of 31421764 is about 315.5562992518.

The spelling of 31421764 in words is "thirty-one million, four hundred twenty-one thousand, seven hundred sixty-four".