251045201025215 has 16 divisors (see below), whose sum is σ = 311643647333280. Its totient is φ = 193909949143680.

The previous prime is 251045201025149. The next prime is 251045201025287. The reversal of 251045201025215 is 512520102540152.

It is not a de Polignac number, because 251045201025215 - 2³² = 251040906057919 is a prime.

It is a super-2 number, since 2×251045201025215² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31591277 + ... + 38731113.

It is an arithmetic number, because the mean of its divisors is an integer number (19477727958330).

Almost surely, 2^{251045201025215} is an apocalyptic number.

251045201025215 is a deficient number, since it is larger than the sum of its proper divisors (60598446308065).

251045201025215 is a wasteful number, since it uses less digits than its factorization.

251045201025215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7382362.

The product of its (nonzero) digits is 40000, while the sum is 35.

Adding to 251045201025215 its reverse (512520102540152), we get a palindrome (763565303565367).

The spelling of 251045201025215 in words is "two hundred fifty-one trillion, forty-five billion, two hundred one million, twenty-five thousand, two hundred fifteen".