315013231 has 4 divisors (see below), whose sum is σ = 339245032. Its totient is φ = 290781432.

The previous prime is 315013229. The next prime is 315013241. The reversal of 315013231 is 132310513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132310513 = 23 ⋅5752631.

It is a cyclic number.

It is not a de Polignac number, because 315013231 - 2¹ = 315013229 is a prime.

It is a super-2 number, since 2×315013231² = 198466671410118722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 315013199 and 315013208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315013201) 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, 12115881 + ... + 12115906.

It is an arithmetic number, because the mean of its divisors is an integer number (84811258).

Almost surely, 2^315013231 is an apocalyptic number.

315013231 is a deficient number, since it is larger than the sum of its proper divisors (24231801).

315013231 is a wasteful number, since it uses less digits than its factorization.

315013231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24231800.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 315013231 is about 17748.6120865830. The cubic root of 315013231 is about 680.4187379109.

Adding to 315013231 its reverse (132310513), we get a palindrome (447323744).

The spelling of 315013231 in words is "three hundred fifteen million, thirteen thousand, two hundred thirty-one".