315991211 has 6 divisors (see below), whose sum is σ = 324763740. Its totient is φ = 307449576.

The previous prime is 315991201. The next prime is 315991217. The reversal of 315991211 is 112199513.

It is a de Polignac number, because none of the positive numbers 2^k-315991211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315991217) 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, 114041 + ... + 116778.

It is an arithmetic number, because the mean of its divisors is an integer number (54127290).

Almost surely, 2^315991211 is an apocalyptic number.

315991211 is a deficient number, since it is larger than the sum of its proper divisors (8772529).

315991211 is an equidigital number, since it uses as much as digits as its factorization.

315991211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230893 (or 230856 counting only the distinct ones).

The product of its digits is 2430, while the sum is 32.

The square root of 315991211 is about 17776.1416229732. The cubic root of 315991211 is about 681.1221459023.

The spelling of 315991211 in words is "three hundred fifteen million, nine hundred ninety-one thousand, two hundred eleven".