31241663240 has 16 divisors (see below), whose sum is σ = 70293742380. Its totient is φ = 12496665280.

The previous prime is 31241663207. The next prime is 31241663263. The reversal of 31241663240 is 4236614213.

It can be written as a sum of positive squares in 2 ways, for example, as 28877564356 + 2364098884 = 169934^2 + 48622^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31241663197 and 31241663206.

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, 390520751 + ... + 390520830.

Almost surely, 2^31241663240 is an apocalyptic number.

It is an amenable number.

31241663240 is an abundant number, since it is smaller than the sum of its proper divisors (39052079140).

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

31241663240 is a wasteful number, since it uses less digits than its factorization.

31241663240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781041592 (or 781041588 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 31241663240 in words is "thirty-one billion, two hundred forty-one million, six hundred sixty-three thousand, two hundred forty".