315639473 has 4 divisors (see below), whose sum is σ = 315940848. Its totient is φ = 315338100.

The previous prime is 315639461. The next prime is 315639481. The reversal of 315639473 is 374936513.

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 315639473 - 2²⁰ = 314590897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315639473.

It is not an unprimeable number, because it can be changed into a prime (315639403) 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, 149111 + ... + 151212.

It is an arithmetic number, because the mean of its divisors is an integer number (78985212).

Almost surely, 2^315639473 is an apocalyptic number.

It is an amenable number.

315639473 is a deficient number, since it is larger than the sum of its proper divisors (301375).

315639473 is a wasteful number, since it uses less digits than its factorization.

315639473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301374.

The product of its digits is 204120, while the sum is 41.

The square root of 315639473 is about 17766.2453264611. The cubic root of 315639473 is about 680.8693271730.

The spelling of 315639473 in words is "three hundred fifteen million, six hundred thirty-nine thousand, four hundred seventy-three".