315125231 has 4 divisors (see below), whose sum is σ = 328826352. Its totient is φ = 301424112.

The previous prime is 315125201. The next prime is 315125269. The reversal of 315125231 is 132521513.

It is a happy number.

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 315125231 - 2¹⁴ = 315108847 is a prime.

It is a super-2 number, since 2×315125231² = 198607822425606722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 13701097 = 315125231 / (3 + 1 + 5 + 1 + 2 + 5 + 2 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 315125197 and 315125206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315125201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6850526 + ... + 6850571.

It is an arithmetic number, because the mean of its divisors is an integer number (82206588).

Almost surely, 2^315125231 is an apocalyptic number.

315125231 is a deficient number, since it is larger than the sum of its proper divisors (13701121).

315125231 is a wasteful number, since it uses less digits than its factorization.

315125231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13701120.

The product of its digits is 900, while the sum is 23.

The square root of 315125231 is about 17751.7669824725. The cubic root of 315125231 is about 680.4993671897.

Adding to 315125231 its reverse (132521513), we get a palindrome (447646744).

It can be divided in two parts, 3151 and 25231, that added together give a palindrome (28382).

The spelling of 315125231 in words is "three hundred fifteen million, one hundred twenty-five thousand, two hundred thirty-one".