315105231 has 12 divisors (see below), whose sum is σ = 488734872. Its totient is φ = 180060048.

The previous prime is 315105191. The next prime is 315105257. The reversal of 315105231 is 132501513.

It is not a de Polignac number, because 315105231 - 2¹⁴ = 315088847 is a prime.

It is a super-2 number, since 2×315105231² = 198582613207126722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 315105198 and 315105207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315105031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1071640 + ... + 1071933.

It is an arithmetic number, because the mean of its divisors is an integer number (40727906).

Almost surely, 2^315105231 is an apocalyptic number.

315105231 is a deficient number, since it is larger than the sum of its proper divisors (173629641).

315105231 is a wasteful number, since it uses less digits than its factorization.

315105231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2143590 (or 2143583 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 315105231 is about 17751.2036493304. The cubic root of 315105231 is about 680.4849705055.

Adding to 315105231 its reverse (132501513), we get a palindrome (447606744).

The spelling of 315105231 in words is "three hundred fifteen million, one hundred five thousand, two hundred thirty-one".