315031 has 4 divisors (see below), whose sum is σ = 328752. Its totient is φ = 301312.

The previous prime is 315013. The next prime is 315037. The reversal of 315031 is 130513.

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 315031 - 2⁷ = 314903 is a prime.

It is a super-2 number, since 2×315031² = 198489061922, 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 (315037) 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, 6826 + ... + 6871.

It is an arithmetic number, because the mean of its divisors is an integer number (82188).

2³¹⁵⁰³¹ is an apocalyptic number.

315031 is a deficient number, since it is larger than the sum of its proper divisors (13721).

315031 is a wasteful number, since it uses less digits than its factorization.

315031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13720.

The product of its (nonzero) digits is 45, while the sum is 13.

The square root of 315031 is about 561.2762243317. The cubic root of 315031 is about 68.0431531165.

Adding to 315031 its reverse (130513), we get a palindrome (445544).

It can be divided in two parts, 31 and 5031, that multiplied together give a triangular number (155961 = T₅₅₈).

The spelling of 315031 in words is "three hundred fifteen thousand, thirty-one".