313000221440 has 72 divisors (see below), whose sum is σ = 782330518368. Its totient is φ = 119756595200.

The previous prime is 313000221419. The next prime is 313000221487. The reversal of 313000221440 is 44122000313.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5286461 + ... + 5345340.

It is an arithmetic number, because the mean of its divisors is an integer number (10865701644).

Almost surely, 2^313000221440 is an apocalyptic number.

It is an amenable number.

313000221440 is an abundant number, since it is smaller than the sum of its proper divisors (469330296928).

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

313000221440 is a wasteful number, since it uses less digits than its factorization.

313000221440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10631845 (or 10631831 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 313000221440 its reverse (44122000313), we get a palindrome (357122221753).

The spelling of 313000221440 in words is "three hundred thirteen billion, two hundred twenty-one thousand, four hundred forty".