315261973 has 4 divisors (see below), whose sum is σ = 339512908. Its totient is φ = 291011040.

The previous prime is 315261959. The next prime is 315261979. The reversal of 315261973 is 379162513.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 205578244 + 109683729 = 14338^2 + 10473^2 .

It is a cyclic number.

It is not a de Polignac number, because 315261973 - 2¹⁷ = 315130901 is a prime.

It is a super-2 number, since 2×315261973² = 198780223239705458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315261979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12125448 + ... + 12125473.

It is an arithmetic number, because the mean of its divisors is an integer number (84878227).

Almost surely, 2^315261973 is an apocalyptic number.

It is an amenable number.

315261973 is a deficient number, since it is larger than the sum of its proper divisors (24250935).

315261973 is a wasteful number, since it uses less digits than its factorization.

315261973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24250934.

The product of its digits is 34020, while the sum is 37.

The square root of 315261973 is about 17755.6180686565. The cubic root of 315261973 is about 680.5977824430.

The spelling of 315261973 in words is "three hundred fifteen million, two hundred sixty-one thousand, nine hundred seventy-three".