315841961 has 2 divisors, whose sum is σ = 315841962. Its totient is φ = 315841960.

The previous prime is 315841951. The next prime is 315841979. The reversal of 315841961 is 169148513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246019225 + 69822736 = 15685^2 + 8356^2 .

It is a cyclic number.

It is not a de Polignac number, because 315841961 - 2¹⁰ = 315840937 is a prime.

It is a super-2 number, since 2×315841961² = 199512288656651042, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (315841931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157920980 + 157920981.

It is an arithmetic number, because the mean of its divisors is an integer number (157920981).

Almost surely, 2^315841961 is an apocalyptic number.

It is an amenable number.

315841961 is a deficient number, since it is larger than the sum of its proper divisors (1).

315841961 is an equidigital number, since it uses as much as digits as its factorization.

315841961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 38.

The square root of 315841961 is about 17771.9430845364. The cubic root of 315841961 is about 681.0148924028.

The spelling of 315841961 in words is "three hundred fifteen million, eight hundred forty-one thousand, nine hundred sixty-one".