31781300852 has 48 divisors (see below), whose sum is σ = 65330818560. Its totient is φ = 13246675200.

The previous prime is 31781300819. The next prime is 31781300899. The reversal of 31781300852 is 25800318713.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47477 + ... + 256547.

It is an arithmetic number, because the mean of its divisors is an integer number (1361058720).

Almost surely, 2^31781300852 is an apocalyptic number.

It is an amenable number.

31781300852 is an abundant number, since it is smaller than the sum of its proper divisors (33549517708).

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

31781300852 is a wasteful number, since it uses less digits than its factorization.

31781300852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209232 (or 209230 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 31781300852 in words is "thirty-one billion, seven hundred eighty-one million, three hundred thousand, eight hundred fifty-two".