315823991 has 16 divisors (see below), whose sum is σ = 368167680. Its totient is φ = 265315200.

The previous prime is 315823987. The next prime is 315824021. The reversal of 315823991 is 199328513.

It is a cyclic number.

It is not a de Polignac number, because 315823991 - 2² = 315823987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315823961) 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 in 15 ways as a sum of consecutive naturals, for example, 164660 + ... + 166566.

It is an arithmetic number, because the mean of its divisors is an integer number (23010480).

Almost surely, 2^315823991 is an apocalyptic number.

315823991 is a deficient number, since it is larger than the sum of its proper divisors (52343689).

315823991 is a wasteful number, since it uses less digits than its factorization.

315823991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2374.

The product of its digits is 58320, while the sum is 41.

The square root of 315823991 is about 17771.4375051654. The cubic root of 315823991 is about 681.0019765871.

The spelling of 315823991 in words is "three hundred fifteen million, eight hundred twenty-three thousand, nine hundred ninety-one".