315244231 has 2 divisors, whose sum is σ = 315244232. Its totient is φ = 315244230.

The previous prime is 315244229. The next prime is 315244271. The reversal of 315244231 is 132442513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315244231 - 2¹ = 315244229 is a prime.

It is a super-2 number, since 2×315244231² = 198757850357562722, which contains 22 as substring.

Together with 315244229, it forms a pair of twin primes.

It is equal to p_17032462 and since 315244231 and 17032462 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 315244196 and 315244205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315244201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157622115 + 157622116.

It is an arithmetic number, because the mean of its divisors is an integer number (157622116).

Almost surely, 2^315244231 is an apocalyptic number.

315244231 is a deficient number, since it is larger than the sum of its proper divisors (1).

315244231 is an equidigital number, since it uses as much as digits as its factorization.

315244231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 25.

The square root of 315244231 is about 17755.1184451132. The cubic root of 315244231 is about 680.5850148683.

Adding to 315244231 its reverse (132442513), we get a palindrome (447686744).

The spelling of 315244231 in words is "three hundred fifteen million, two hundred forty-four thousand, two hundred thirty-one".