315997951 has 2 divisors, whose sum is σ = 315997952. Its totient is φ = 315997950.

The previous prime is 315997939. The next prime is 315998017. The reversal of 315997951 is 159799513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315997951 - 2¹⁵ = 315965183 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 315997895 and 315997904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315997931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157998975 + 157998976.

It is an arithmetic number, because the mean of its divisors is an integer number (157998976).

Almost surely, 2^315997951 is an apocalyptic number.

315997951 is a deficient number, since it is larger than the sum of its proper divisors (1).

315997951 is an equidigital number, since it uses as much as digits as its factorization.

315997951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 382725, while the sum is 49.

The square root of 315997951 is about 17776.3312019100. The cubic root of 315997951 is about 681.1269885798.

The spelling of 315997951 in words is "three hundred fifteen million, nine hundred ninety-seven thousand, nine hundred fifty-one".