315972406 has 4 divisors (see below), whose sum is σ = 473958612. Its totient is φ = 157986202.

The previous prime is 315972401. The next prime is 315972427. The reversal of 315972406 is 604279513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 604279513 = 4339 ⋅139267.

It is a super-2 number, since 2×315972406² = 199677122706857672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315972401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78993100 + ... + 78993103.

It is an arithmetic number, because the mean of its divisors is an integer number (118489653).

Almost surely, 2^315972406 is an apocalyptic number.

315972406 is a deficient number, since it is larger than the sum of its proper divisors (157986206).

315972406 is a wasteful number, since it uses less digits than its factorization.

315972406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157986205.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 315972406 is about 17775.6126757983. The cubic root of 315972406 is about 681.1086341805.

The spelling of 315972406 in words is "three hundred fifteen million, nine hundred seventy-two thousand, four hundred six".