313055521000 has 64 divisors (see below), whose sum is σ = 739270818000. Its totient is φ = 124073337600.

The previous prime is 313055520997. The next prime is 313055521001. The reversal of 313055521000 is 125550313.

It can be written as a sum of positive squares in 8 ways, for example, as 983575044 + 312071945956 = 31362^2 + 558634^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (313055521001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1327035 + ... + 1545034.

Almost surely, 2^313055521000 is an apocalyptic number.

It is an amenable number.

313055521000 is an abundant number, since it is smaller than the sum of its proper divisors (426215297000).

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

313055521000 is a wasteful number, since it uses less digits than its factorization.

313055521000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2872199 (or 2872185 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The spelling of 313055521000 in words is "three hundred thirteen billion, fifty-five million, five hundred twenty-one thousand".