315242251 has 16 divisors (see below), whose sum is σ = 331348320. Its totient is φ = 299669760.

The previous prime is 315242233. The next prime is 315242287. The reversal of 315242251 is 152242513.

It is a cyclic number.

It is not a de Polignac number, because 315242251 - 2¹⁵ = 315209483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315246251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227581 + ... + 228961.

It is an arithmetic number, because the mean of its divisors is an integer number (20709270).

Almost surely, 2^315242251 is an apocalyptic number.

315242251 is a deficient number, since it is larger than the sum of its proper divisors (16106069).

315242251 is a wasteful number, since it uses less digits than its factorization.

315242251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566.

The product of its digits is 2400, while the sum is 25.

The square root of 315242251 is about 17755.0626864565. The cubic root of 315242251 is about 680.5835899824.

Adding to 315242251 its reverse (152242513), we get a palindrome (467484764).

The spelling of 315242251 in words is "three hundred fifteen million, two hundred forty-two thousand, two hundred fifty-one".