251525522113 has 2 divisors, whose sum is σ = 251525522114. Its totient is φ = 251525522112.

The previous prime is 251525522111. The next prime is 251525522179. The reversal of 251525522113 is 311225525152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178529910784 + 72995611329 = 422528^2 + 270177^2 .

It is a cyclic number.

It is not a de Polignac number, because 251525522113 - 2¹ = 251525522111 is a prime.

Together with 251525522111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (251525522111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125762761056 + 125762761057.

It is an arithmetic number, because the mean of its divisors is an integer number (125762761057).

Almost surely, 2^251525522113 is an apocalyptic number.

It is an amenable number.

251525522113 is a deficient number, since it is larger than the sum of its proper divisors (1).

251525522113 is an equidigital number, since it uses as much as digits as its factorization.

251525522113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30000, while the sum is 34.

The spelling of 251525522113 in words is "two hundred fifty-one billion, five hundred twenty-five million, five hundred twenty-two thousand, one hundred thirteen".