315408813 has 4 divisors (see below), whose sum is σ = 420545088. Its totient is φ = 210272540.

The previous prime is 315408811. The next prime is 315408829. The reversal of 315408813 is 318804513.

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 315408813 - 2¹ = 315408811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315408811) 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, 52568133 + ... + 52568138.

It is an arithmetic number, because the mean of its divisors is an integer number (105136272).

Almost surely, 2^315408813 is an apocalyptic number.

It is an amenable number.

315408813 is a deficient number, since it is larger than the sum of its proper divisors (105136275).

315408813 is a wasteful number, since it uses less digits than its factorization.

315408813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105136274.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 315408813 is about 17759.7526165203. The cubic root of 315408813 is about 680.7034336947.

The spelling of 315408813 in words is "three hundred fifteen million, four hundred eight thousand, eight hundred thirteen".