251420134426613 has 2 divisors, whose sum is σ = 251420134426614. Its totient is φ = 251420134426612.

The previous prime is 251420134426543. The next prime is 251420134426633. The reversal of 251420134426613 is 316624431024152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240644264620369 + 10775869806244 = 15512713^2 + 3282662^2 .

It is a cyclic number.

It is not a de Polignac number, because 251420134426613 - 2³⁸ = 251145256519669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251420134426633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125710067213306 + 125710067213307.

It is an arithmetic number, because the mean of its divisors is an integer number (125710067213307).

Almost surely, 2^{251420134426613} is an apocalyptic number.

It is an amenable number.

251420134426613 is a deficient number, since it is larger than the sum of its proper divisors (1).

251420134426613 is an equidigital number, since it uses as much as digits as its factorization.

251420134426613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 251420134426613 in words is "two hundred fifty-one trillion, four hundred twenty billion, one hundred thirty-four million, four hundred twenty-six thousand, six hundred thirteen".