251044269901 has 2 divisors, whose sum is σ = 251044269902. Its totient is φ = 251044269900.

The previous prime is 251044269899. The next prime is 251044269923. The reversal of 251044269901 is 109962440152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245669913801 + 5374356100 = 495651^2 + 73310^2 .

It is a cyclic number.

It is not a de Polignac number, because 251044269901 - 2¹ = 251044269899 is a prime.

It is a super-2 number, since 2×251044269901² (a number of 24 digits) contains 22 as substring.

Together with 251044269899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251044269941) 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, 125522134950 + 125522134951.

It is an arithmetic number, because the mean of its divisors is an integer number (125522134951).

Almost surely, 2^251044269901 is an apocalyptic number.

It is an amenable number.

251044269901 is a deficient number, since it is larger than the sum of its proper divisors (1).

251044269901 is an equidigital number, since it uses as much as digits as its factorization.

251044269901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 251044269901 in words is "two hundred fifty-one billion, forty-four million, two hundred sixty-nine thousand, nine hundred one".