251350313009 has 2 divisors, whose sum is σ = 251350313010. Its totient is φ = 251350313008.

The previous prime is 251350312991. The next prime is 251350313099. The reversal of 251350313009 is 900313053152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231707449600 + 19642863409 = 481360^2 + 140153^2 .

It is a cyclic number.

It is not a de Polignac number, because 251350313009 - 2²⁴ = 251333535793 is a prime.

It is not a weakly prime, because it can be changed into another prime (251350313099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125675156504 + 125675156505.

It is an arithmetic number, because the mean of its divisors is an integer number (125675156505).

Almost surely, 2^251350313009 is an apocalyptic number.

It is an amenable number.

251350313009 is a deficient number, since it is larger than the sum of its proper divisors (1).

251350313009 is an equidigital number, since it uses as much as digits as its factorization.

251350313009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12150, while the sum is 32.

The spelling of 251350313009 in words is "two hundred fifty-one billion, three hundred fifty million, three hundred thirteen thousand, nine".