315251 has 2 divisors, whose sum is σ = 315252. Its totient is φ = 315250.

The previous prime is 315247. The next prime is 315257. The reversal of 315251 is 152513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315251 - 2² = 315247 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 315251.

It is not a weakly prime, because it can be changed into another prime (315257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157625 + 157626.

It is an arithmetic number, because the mean of its divisors is an integer number (157626).

2³¹⁵²⁵¹ is an apocalyptic number.

315251 is a deficient number, since it is larger than the sum of its proper divisors (1).

315251 is an equidigital number, since it uses as much as digits as its factorization.

315251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150, while the sum is 17.

The square root of 315251 is about 561.4721720620. The cubic root of 315251 is about 68.0589886062.

Adding to 315251 its reverse (152513), we get a palindrome (467764).

It can be divided in two parts, 3 and 15251, that multiplied together give a triangular number (45753 = T₃₀₂).

The spelling of 315251 in words is "three hundred fifteen thousand, two hundred fifty-one".