313151231 has 2 divisors, whose sum is σ = 313151232. Its totient is φ = 313151230.

The previous prime is 313151221. The next prime is 313151257. The reversal of 313151231 is 132151313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 313151231 - 2²² = 308956927 is a prime.

It is a super-2 number, since 2×313151231² = 196127386953630722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313151221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156575615 + 156575616.

It is an arithmetic number, because the mean of its divisors is an integer number (156575616).

Almost surely, 2^313151231 is an apocalyptic number.

313151231 is a deficient number, since it is larger than the sum of its proper divisors (1).

313151231 is an equidigital number, since it uses as much as digits as its factorization.

313151231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270, while the sum is 20.

The square root of 313151231 is about 17696.0795375699. The cubic root of 313151231 is about 679.0754671842.

The spelling of 313151231 in words is "three hundred thirteen million, one hundred fifty-one thousand, two hundred thirty-one".