31299470272 has 112 divisors (see below), whose sum is σ = 72613601280. Its totient is φ = 13106829312.

The previous prime is 31299470269. The next prime is 31299470281. The reversal of 31299470272 is 27207499213.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 21750129 + ... + 21751567.

Almost surely, 2^31299470272 is an apocalyptic number.

31299470272 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31299470272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36306800640).

31299470272 is an abundant number, since it is smaller than the sum of its proper divisors (41314131008).

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

31299470272 is a wasteful number, since it uses less digits than its factorization.

31299470272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2538 (or 2528 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 46.

The spelling of 31299470272 in words is "thirty-one billion, two hundred ninety-nine million, four hundred seventy thousand, two hundred seventy-two".