315125665 has 8 divisors (see below), whose sum is σ = 378809640. Its totient is φ = 251661312.

The previous prime is 315125653. The next prime is 315125669. The reversal of 315125665 is 566521513.

315125665 is nontrivially palindromic in base 7.

It can be written as a sum of positive squares in 4 ways, for example, as 178516321 + 136609344 = 13361^2 + 11688^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 315125665 - 2¹⁷ = 314994593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 315125665.

It is not an unprimeable number, because it can be changed into a prime (315125669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51730 + ... + 57499.

It is an arithmetic number, because the mean of its divisors is an integer number (47351205).

Almost surely, 2^315125665 is an apocalyptic number.

It is an amenable number.

315125665 is a deficient number, since it is larger than the sum of its proper divisors (63683975).

315125665 is a wasteful number, since it uses less digits than its factorization.

315125665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109811.

The product of its digits is 27000, while the sum is 34.

The square root of 315125665 is about 17751.7792066035. The cubic root of 315125665 is about 680.4996795910.

It can be divided in two parts, 31 and 5125665, that added together give a square (5125696 = 2264²).

The spelling of 315125665 in words is "three hundred fifteen million, one hundred twenty-five thousand, six hundred sixty-five".