251255441 has 2 divisors, whose sum is σ = 251255442. Its totient is φ = 251255440.

The previous prime is 251255437. The next prime is 251255447. The reversal of 251255441 is 144552152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249640000 + 1615441 = 15800^2 + 1271^2 .

It is a cyclic number.

It is not a de Polignac number, because 251255441 - 2² = 251255437 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (251255447) 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, 125627720 + 125627721.

It is an arithmetic number, because the mean of its divisors is an integer number (125627721).

Almost surely, 2^251255441 is an apocalyptic number.

It is an amenable number.

251255441 is a deficient number, since it is larger than the sum of its proper divisors (1).

251255441 is an equidigital number, since it uses as much as digits as its factorization.

251255441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8000, while the sum is 29.

The square root of 251255441 is about 15851.0391142032. The cubic root of 251255441 is about 631.0132690601.

The spelling of 251255441 in words is "two hundred fifty-one million, two hundred fifty-five thousand, four hundred forty-one".