3115331231 has 2 divisors, whose sum is σ = 3115331232. Its totient is φ = 3115331230.

The previous prime is 3115331207. The next prime is 3115331237. The reversal of 3115331231 is 1321335113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3115331231 is a prime.

It is a super-2 number, since 2×3115331231² = 19410577357687950722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 3115331197 and 3115331206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3115331237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1557665615 + 1557665616.

It is an arithmetic number, because the mean of its divisors is an integer number (1557665616).

Almost surely, 2^3115331231 is an apocalyptic number.

3115331231 is a deficient number, since it is larger than the sum of its proper divisors (1).

3115331231 is an equidigital number, since it uses as much as digits as its factorization.

3115331231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810, while the sum is 23.

The square root of 3115331231 is about 55815.1523423523. The cubic root of 3115331231 is about 1460.4994899150.

Adding to 3115331231 its reverse (1321335113), we get a palindrome (4436666344).

The spelling of 3115331231 in words is "three billion, one hundred fifteen million, three hundred thirty-one thousand, two hundred thirty-one".