315388831 has 2 divisors, whose sum is σ = 315388832. Its totient is φ = 315388830.

The previous prime is 315388819. The next prime is 315388837. The reversal of 315388831 is 138883513.

It is a strong prime.

It is an emirp because it is prime and its reverse (138883513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315388831 - 2¹¹ = 315386783 is a prime.

It is a super-2 number, since 2×315388831² = 198940229439093122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315388837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157694415 + 157694416.

It is an arithmetic number, because the mean of its divisors is an integer number (157694416).

Almost surely, 2^315388831 is an apocalyptic number.

315388831 is a deficient number, since it is larger than the sum of its proper divisors (1).

315388831 is an equidigital number, since it uses as much as digits as its factorization.

315388831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 40.

The square root of 315388831 is about 17759.1900434676. The cubic root of 315388831 is about 680.6890585909.

The spelling of 315388831 in words is "three hundred fifteen million, three hundred eighty-eight thousand, eight hundred thirty-one".