2315231 has 2 divisors, whose sum is σ = 2315232. Its totient is φ = 2315230.

The previous prime is 2315227. The next prime is 2315233. The reversal of 2315231 is 1325132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2315231 - 2² = 2315227 is a prime.

It is a super-2 number, since 2×2315231² = 10720589166722, which contains 22 as substring.

Together with 2315233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2315233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1157615 + 1157616.

It is an arithmetic number, because the mean of its divisors is an integer number (1157616).

2^2315231 is an apocalyptic number.

2315231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2315231 is an equidigital number, since it uses as much as digits as its factorization.

2315231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 17.

The square root of 2315231 is about 1521.5883148868. The cubic root of 2315231 is about 132.2913483559.

Subtracting from 2315231 its reverse (1325132), we obtain a palindrome (990099).

The spelling of 2315231 in words is "two million, three hundred fifteen thousand, two hundred thirty-one".