313531240 has 32 divisors (see below), whose sum is σ = 769577760. Its totient is φ = 114011200.

The previous prime is 313531157. The next prime is 313531259. The reversal of 313531240 is 42135313.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 355846 + ... + 356725.

It is an arithmetic number, because the mean of its divisors is an integer number (24049305).

Almost surely, 2^313531240 is an apocalyptic number.

It is an amenable number.

313531240 is an abundant number, since it is smaller than the sum of its proper divisors (456046520).

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

313531240 is a wasteful number, since it uses less digits than its factorization.

313531240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712593 (or 712589 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 313531240 is about 17706.8133779063. The cubic root of 313531240 is about 679.3500421615.

Adding to 313531240 its reverse (42135313), we get a palindrome (355666553).

The spelling of 313531240 in words is "three hundred thirteen million, five hundred thirty-one thousand, two hundred forty".