315131 has 4 divisors (see below), whose sum is σ = 319200. Its totient is φ = 311064.

The previous prime is 315127. The next prime is 315179. The reversal of 315131 is 131513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131513 = 347 ⋅379.

It is a cyclic number.

It is not a de Polignac number, because 315131 - 2² = 315127 is a prime.

It is a super-2 number, since 2×315131² = 198615094322, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 315131.

It is not an unprimeable number, because it can be changed into a prime (315181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1916 + ... + 2073.

It is an arithmetic number, because the mean of its divisors is an integer number (79800).

2³¹⁵¹³¹ is an apocalyptic number.

315131 is a deficient number, since it is larger than the sum of its proper divisors (4069).

315131 is an equidigital number, since it uses as much as digits as its factorization.

315131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4068.

The product of its digits is 45, while the sum is 14.

The square root of 315131 is about 561.3652999607. The cubic root of 315131 is about 68.0503519800.

Adding to 315131 its reverse (131513), we get a palindrome (446644).

The spelling of 315131 in words is "three hundred fifteen thousand, one hundred thirty-one".