251242251324013 has 2 divisors, whose sum is σ = 251242251324014. Its totient is φ = 251242251324012.

The previous prime is 251242251324007. The next prime is 251242251324061. The reversal of 251242251324013 is 310423152242152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133737128283529 + 117505123040484 = 11564477^2 + 10839978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251242251324013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251242251324313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125621125662006 + 125621125662007.

It is an arithmetic number, because the mean of its divisors is an integer number (125621125662007).

Almost surely, 2^{251242251324013} is an apocalyptic number.

It is an amenable number.

251242251324013 is a deficient number, since it is larger than the sum of its proper divisors (1).

251242251324013 is an equidigital number, since it uses as much as digits as its factorization.

251242251324013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 251242251324013 in words is "two hundred fifty-one trillion, two hundred forty-two billion, two hundred fifty-one million, three hundred twenty-four thousand, thirteen".