315885901 has 2 divisors, whose sum is σ = 315885902. Its totient is φ = 315885900.

The previous prime is 315885851. The next prime is 315885907. The reversal of 315885901 is 109588513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312370276 + 3515625 = 17674^2 + 1875^2 .

It is a cyclic number.

It is not a de Polignac number, because 315885901 - 2¹⁵ = 315853133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315885907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157942950 + 157942951.

It is an arithmetic number, because the mean of its divisors is an integer number (157942951).

Almost surely, 2^315885901 is an apocalyptic number.

It is an amenable number.

315885901 is a deficient number, since it is larger than the sum of its proper divisors (1).

315885901 is an equidigital number, since it uses as much as digits as its factorization.

315885901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 40.

The square root of 315885901 is about 17773.1792597723. The cubic root of 315885901 is about 681.0464719168.

The spelling of 315885901 in words is "three hundred fifteen million, eight hundred eighty-five thousand, nine hundred one".