251033552500949 has 2 divisors, whose sum is σ = 251033552500950. Its totient is φ = 251033552500948.

The previous prime is 251033552500873. The next prime is 251033552501129. The reversal of 251033552500949 is 949005255330152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175631804338225 + 75401748162724 = 13252615^2 + 8683418^2 .

It is a cyclic number.

It is not a de Polignac number, because 251033552500949 - 2⁸ = 251033552500693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 251033552500949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251033552506949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125516776250474 + 125516776250475.

It is an arithmetic number, because the mean of its divisors is an integer number (125516776250475).

Almost surely, 2^{251033552500949} is an apocalyptic number.

It is an amenable number.

251033552500949 is a deficient number, since it is larger than the sum of its proper divisors (1).

251033552500949 is an equidigital number, since it uses as much as digits as its factorization.

251033552500949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290000, while the sum is 53.

The spelling of 251033552500949 in words is "two hundred fifty-one trillion, thirty-three billion, five hundred fifty-two million, five hundred thousand, nine hundred forty-nine".