315866913 has 4 divisors (see below), whose sum is σ = 421155888. Its totient is φ = 210577940.

The previous prime is 315866899. The next prime is 315866923. The reversal of 315866913 is 319668513.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 315866913 - 2¹⁰ = 315865889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (315866923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52644483 + ... + 52644488.

It is an arithmetic number, because the mean of its divisors is an integer number (105288972).

Almost surely, 2^315866913 is an apocalyptic number.

It is an amenable number.

315866913 is a deficient number, since it is larger than the sum of its proper divisors (105288975).

315866913 is a wasteful number, since it uses less digits than its factorization.

315866913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105288974.

The product of its digits is 116640, while the sum is 42.

The square root of 315866913 is about 17772.6450760713. The cubic root of 315866913 is about 681.0328256714.

The spelling of 315866913 in words is "three hundred fifteen million, eight hundred sixty-six thousand, nine hundred thirteen".