251255554097 has 2 divisors, whose sum is σ = 251255554098. Its totient is φ = 251255554096.

The previous prime is 251255554093. The next prime is 251255554111. The reversal of 251255554097 is 790455552152.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245501421361 + 5754132736 = 495481^2 + 75856^2 .

It is a cyclic number.

It is not a de Polignac number, because 251255554097 - 2² = 251255554093 is a prime.

It is not a weakly prime, because it can be changed into another prime (251255554093) 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, 125627777048 + 125627777049.

It is an arithmetic number, because the mean of its divisors is an integer number (125627777049).

Almost surely, 2^251255554097 is an apocalyptic number.

It is an amenable number.

251255554097 is a deficient number, since it is larger than the sum of its proper divisors (1).

251255554097 is an equidigital number, since it uses as much as digits as its factorization.

251255554097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3150000, while the sum is 50.

It can be divided in two parts, 2512555 and 54097, that added together give a palindrome (2566652).

The spelling of 251255554097 in words is "two hundred fifty-one billion, two hundred fifty-five million, five hundred fifty-four thousand, ninety-seven".