315431 has 4 divisors (see below), whose sum is σ = 320664. Its totient is φ = 310200.

The previous prime is 315421. The next prime is 315437. The reversal of 315431 is 134513.

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

It is a cyclic number.

It is not a de Polignac number, because 315431 - 2¹⁰ = 314407 is a prime.

It is a super-2 number, since 2×315431² = 198993431522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 315431.

It is not an unprimeable number, because it can be changed into a prime (315437) 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, 2525 + ... + 2646.

It is an arithmetic number, because the mean of its divisors is an integer number (80166).

2³¹⁵⁴³¹ is an apocalyptic number.

315431 is a deficient number, since it is larger than the sum of its proper divisors (5233).

315431 is an equidigital number, since it uses as much as digits as its factorization.

315431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5232.

The product of its digits is 180, while the sum is 17.

The square root of 315431 is about 561.6324420829. The cubic root of 315431 is about 68.0719394370.

Adding to 315431 its reverse (134513), we get a palindrome (449944).

The spelling of 315431 in words is "three hundred fifteen thousand, four hundred thirty-one".