313223454640 has 20 divisors (see below), whose sum is σ = 728244532224. Its totient is φ = 125289381824.

The previous prime is 313223454629. The next prime is 313223454671. The reversal of 313223454640 is 46454322313.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×313223454640² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 313223454640.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1957646512 + ... + 1957646671.

Almost surely, 2^313223454640 is an apocalyptic number.

It is an amenable number.

313223454640 is an abundant number, since it is smaller than the sum of its proper divisors (415021077584).

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

313223454640 is a wasteful number, since it uses less digits than its factorization.

313223454640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3915293196 (or 3915293190 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 37.

Adding to 313223454640 its reverse (46454322313), we get a palindrome (359677776953).

The spelling of 313223454640 in words is "three hundred thirteen billion, two hundred twenty-three million, four hundred fifty-four thousand, six hundred forty".