315142211 has 2 divisors, whose sum is σ = 315142212. Its totient is φ = 315142210.

The previous prime is 315142183. The next prime is 315142213. The reversal of 315142211 is 112241513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315142211 - 2²² = 310947907 is a prime.

It is a super-2 number, since 2×315142211² = 198629226307937042, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 315142213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (315142213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157571105 + 157571106.

It is an arithmetic number, because the mean of its divisors is an integer number (157571106).

Almost surely, 2^315142211 is an apocalyptic number.

315142211 is a deficient number, since it is larger than the sum of its proper divisors (1).

315142211 is an equidigital number, since it uses as much as digits as its factorization.

315142211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 20.

The square root of 315142211 is about 17752.2452382790. The cubic root of 315142211 is about 680.5115894965.

Adding to 315142211 its reverse (112241513), we get a palindrome (427383724).

The spelling of 315142211 in words is "three hundred fifteen million, one hundred forty-two thousand, two hundred eleven".