318256131 has 4 divisors (see below), whose sum is σ = 424341512. Its totient is φ = 212170752.

The previous prime is 318256117. The next prime is 318256157. The reversal of 318256131 is 131652813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131652813 = 3 ⋅43884271.

It is not a de Polignac number, because 318256131 - 2⁶ = 318256067 is a prime.

It is a super-2 number, since 2×318256131² = 202573929838178322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318256111) 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, 53042686 + ... + 53042691.

It is an arithmetic number, because the mean of its divisors is an integer number (106085378).

Almost surely, 2^318256131 is an apocalyptic number.

318256131 is a deficient number, since it is larger than the sum of its proper divisors (106085381).

318256131 is a wasteful number, since it uses less digits than its factorization.

318256131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106085380.

The product of its digits is 4320, while the sum is 30.

The square root of 318256131 is about 17839.7346112547. The cubic root of 318256131 is about 682.7456256083.

The spelling of 318256131 in words is "three hundred eighteen million, two hundred fifty-six thousand, one hundred thirty-one".