31313470280 has 128 divisors (see below), whose sum is σ = 75300230880. Its totient is φ = 11678515200.

The previous prime is 31313470249. The next prime is 31313470283. The reversal of 31313470280 is 8207431313.

It can be written as a sum of positive squares in 16 ways, for example, as 10224040996 + 21089429284 = 101114^2 + 145222^2 .

It is not an unprimeable number, because it can be changed into a prime (31313470283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52101980 + ... + 52102580.

Almost surely, 2^31313470280 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 31313470280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37650115440).

31313470280 is an abundant number, since it is smaller than the sum of its proper divisors (43986760600).

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

31313470280 is a wasteful number, since it uses less digits than its factorization.

31313470280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219 (or 1215 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The spelling of 31313470280 in words is "thirty-one billion, three hundred thirteen million, four hundred seventy thousand, two hundred eighty".