313213231 has 2 divisors, whose sum is σ = 313213232. Its totient is φ = 313213230.

The previous prime is 313213207. The next prime is 313213237. The reversal of 313213231 is 132312313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 313213231 - 2¹⁵ = 313180463 is a prime.

It is a super-2 number, since 2×313213231² = 196205056146918722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 313213199 and 313213208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313213237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156606615 + 156606616.

It is an arithmetic number, because the mean of its divisors is an integer number (156606616).

Almost surely, 2^313213231 is an apocalyptic number.

313213231 is a deficient number, since it is larger than the sum of its proper divisors (1).

313213231 is an equidigital number, since it uses as much as digits as its factorization.

313213231 is an evil number, because the sum of its binary digits is even.

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

The square root of 313213231 is about 17697.8312513144. The cubic root of 313213231 is about 679.1202803570.

Adding to 313213231 its reverse (132312313), we get a palindrome (445525544).

The spelling of 313213231 in words is "three hundred thirteen million, two hundred thirteen thousand, two hundred thirty-one".