252444531125509 has 2 divisors, whose sum is σ = 252444531125510. Its totient is φ = 252444531125508.

The previous prime is 252444531125363. The next prime is 252444531125597. The reversal of 252444531125509 is 905521135444252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239493731092225 + 12950800033284 = 15475585^2 + 3598722^2 .

It is a cyclic number.

It is not a de Polignac number, because 252444531125509 - 2³⁵ = 252410171387141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252444532125509) 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, 126222265562754 + 126222265562755.

It is an arithmetic number, because the mean of its divisors is an integer number (126222265562755).

Almost surely, 2^{252444531125509} is an apocalyptic number.

It is an amenable number.

252444531125509 is a deficient number, since it is larger than the sum of its proper divisors (1).

252444531125509 is an equidigital number, since it uses as much as digits as its factorization.

252444531125509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640000, while the sum is 52.

The spelling of 252444531125509 in words is "two hundred fifty-two trillion, four hundred forty-four billion, five hundred thirty-one million, one hundred twenty-five thousand, five hundred nine".