315991323 has 6 divisors (see below), whose sum is σ = 456431924. Its totient is φ = 210660876.

The previous prime is 315991321. The next prime is 315991381. The reversal of 315991323 is 323199513.

315991323 is a `hidden beast` number, since 31 + 599 + 1 + 32 + 3 = 666.

It is not a de Polignac number, because 315991323 - 2¹ = 315991321 is a prime.

It is a super-2 number, since 2×315991323² = 199701032422580658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315991321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17555065 + ... + 17555082.

Almost surely, 2^315991323 is an apocalyptic number.

315991323 is a deficient number, since it is larger than the sum of its proper divisors (140440601).

315991323 is a wasteful number, since it uses less digits than its factorization.

315991323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35110153 (or 35110150 counting only the distinct ones).

The product of its digits is 21870, while the sum is 36.

The square root of 315991323 is about 17776.1447732628. The cubic root of 315991323 is about 681.1222263747.

The spelling of 315991323 in words is "three hundred fifteen million, nine hundred ninety-one thousand, three hundred twenty-three".