313132321 has 8 divisors (see below), whose sum is σ = 326462400. Its totient is φ = 300077232.

The previous prime is 313132319. The next prime is 313132387. The reversal of 313132321 is 123231313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 313132321 - 2¹ = 313132319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313132021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66421 + ... + 70978.

It is an arithmetic number, because the mean of its divisors is an integer number (40807800).

Almost surely, 2^313132321 is an apocalyptic number.

It is an amenable number.

313132321 is a deficient number, since it is larger than the sum of its proper divisors (13330079).

313132321 is a wasteful number, since it uses less digits than its factorization.

313132321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137495.

The product of its digits is 324, while the sum is 19.

The square root of 313132321 is about 17695.5452303680. The cubic root of 313132321 is about 679.0617979894.

Adding to 313132321 its reverse (123231313), we get a palindrome (436363634).

The spelling of 313132321 in words is "three hundred thirteen million, one hundred thirty-two thousand, three hundred twenty-one".