251350005133 has 2 divisors, whose sum is σ = 251350005134. Its totient is φ = 251350005132.

The previous prime is 251350005121. The next prime is 251350005149. The reversal of 251350005133 is 331500053152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235207540324 + 16142464809 = 484982^2 + 127053^2 .

It is a cyclic number.

It is not a de Polignac number, because 251350005133 - 2²⁵ = 251316450701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251350005113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125675002566 + 125675002567.

It is an arithmetic number, because the mean of its divisors is an integer number (125675002567).

Almost surely, 2^251350005133 is an apocalyptic number.

It is an amenable number.

251350005133 is a deficient number, since it is larger than the sum of its proper divisors (1).

251350005133 is an equidigital number, since it uses as much as digits as its factorization.

251350005133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 28.

Adding to 251350005133 its reverse (331500053152), we get a palindrome (582850058285).

The spelling of 251350005133 in words is "two hundred fifty-one billion, three hundred fifty million, five thousand, one hundred thirty-three".