315534991 has 2 divisors, whose sum is σ = 315534992. Its totient is φ = 315534990.

The previous prime is 315534983. The next prime is 315535013. The reversal of 315534991 is 199435513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315534991 - 2³ = 315534983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315534931) 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, 157767495 + 157767496.

It is an arithmetic number, because the mean of its divisors is an integer number (157767496).

Almost surely, 2^315534991 is an apocalyptic number.

315534991 is a deficient number, since it is larger than the sum of its proper divisors (1).

315534991 is an equidigital number, since it uses as much as digits as its factorization.

315534991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72900, while the sum is 40.

The square root of 315534991 is about 17763.3046193550. The cubic root of 315534991 is about 680.7941924640.

The spelling of 315534991 in words is "three hundred fifteen million, five hundred thirty-four thousand, nine hundred ninety-one".