313132340 has 12 divisors (see below), whose sum is σ = 657577956. Its totient is φ = 125252928.

The previous prime is 313132319. The next prime is 313132387. The reversal of 313132340 is 43231313.

It can be written as a sum of positive squares in 2 ways, for example, as 73068304 + 240064036 = 8548^2 + 15494^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 15656617 = 313132340 / (3 + 1 + 3 + 1 + 3 + 2 + 3 + 4 + 0).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7828289 + ... + 7828328.

It is an arithmetic number, because the mean of its divisors is an integer number (54798163).

Almost surely, 2^313132340 is an apocalyptic number.

It is an amenable number.

313132340 is an abundant number, since it is smaller than the sum of its proper divisors (344445616).

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

313132340 is a wasteful number, since it uses less digits than its factorization.

313132340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15656626 (or 15656624 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 313132340 is about 17695.5457672263. The cubic root of 313132340 is about 679.0618117239.

Adding to 313132340 its reverse (43231313), we get a palindrome (356363653).

The spelling of 313132340 in words is "three hundred thirteen million, one hundred thirty-two thousand, three hundred forty".