31421663524 has 6 divisors (see below), whose sum is σ = 54987911174. Its totient is φ = 15710831760.

The previous prime is 31421663501. The next prime is 31421663527. The reversal of 31421663524 is 42536612413.

It can be written as a sum of positive squares in only one way, i.e., 26857309924 + 4564353600 = 163882^2 + 67560^2 .

It is not an unprimeable number, because it can be changed into a prime (31421663527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3927707937 + ... + 3927707944.

Almost surely, 2^31421663524 is an apocalyptic number.

It is an amenable number.

31421663524 is a deficient number, since it is larger than the sum of its proper divisors (23566247650).

31421663524 is a wasteful number, since it uses less digits than its factorization.

31421663524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7855415885 (or 7855415883 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

The spelling of 31421663524 in words is "thirty-one billion, four hundred twenty-one million, six hundred sixty-three thousand, five hundred twenty-four".