313120231 has 4 divisors (see below), whose sum is σ = 313791192. Its totient is φ = 312449272.

The previous prime is 313120219. The next prime is 313120277. The reversal of 313120231 is 132021313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132021313 = 7817 ⋅16889.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313120231 is a prime.

It is a super-2 number, since 2×313120231² = 196088558122986722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313120201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334780 + ... + 335713.

It is an arithmetic number, because the mean of its divisors is an integer number (78447798).

Almost surely, 2^313120231 is an apocalyptic number.

313120231 is a deficient number, since it is larger than the sum of its proper divisors (670961).

313120231 is an equidigital number, since it uses as much as digits as its factorization.

313120231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670960.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 313120231 is about 17695.2036156694. The cubic root of 313120231 is about 679.0530583797.

Adding to 313120231 its reverse (132021313), we get a palindrome (445141544).

The spelling of 313120231 in words is "three hundred thirteen million, one hundred twenty thousand, two hundred thirty-one".