31299442480 has 80 divisors (see below), whose sum is σ = 75323973600. Its totient is φ = 12081090560.

The previous prime is 31299442439. The next prime is 31299442513. The reversal of 31299442480 is 8424499213.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 31299442480.

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, 6050295 + ... + 6055465.

It is an arithmetic number, because the mean of its divisors is an integer number (941549670).

Almost surely, 2^31299442480 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31299442480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37661986800).

31299442480 is an abundant number, since it is smaller than the sum of its proper divisors (44024531120).

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

31299442480 is a wasteful number, since it uses less digits than its factorization.

31299442480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7822 (or 7816 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 31299442480 in words is "thirty-one billion, two hundred ninety-nine million, four hundred forty-two thousand, four hundred eighty".