31530147800 has 48 divisors (see below), whose sum is σ = 73592957160. Its totient is φ = 12562964480.

The previous prime is 31530147767. The next prime is 31530147811. The reversal of 31530147800 is 874103513.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255314 + ... + 358113.

Almost surely, 2^31530147800 is an apocalyptic number.

It is an amenable number.

31530147800 is an abundant number, since it is smaller than the sum of its proper divisors (42062809360).

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

31530147800 is a wasteful number, since it uses less digits than its factorization.

31530147800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613700 (or 613691 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 31530147800 in words is "thirty-one billion, five hundred thirty million, one hundred forty-seven thousand, eight hundred".