251341154161 has 2 divisors, whose sum is σ = 251341154162. Its totient is φ = 251341154160.

The previous prime is 251341154159. The next prime is 251341154249. The reversal of 251341154161 is 161451143152.

251341154161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169727520400 + 81613633761 = 411980^2 + 285681^2 .

It is a cyclic number.

It is not a de Polignac number, because 251341154161 - 2¹ = 251341154159 is a prime.

It is a super-2 number, since 2×251341154161² (a number of 24 digits) contains 22 as substring.

Together with 251341154159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (251341154101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125670577080 + 125670577081.

It is an arithmetic number, because the mean of its divisors is an integer number (125670577081).

Almost surely, 2^251341154161 is an apocalyptic number.

It is an amenable number.

251341154161 is a deficient number, since it is larger than the sum of its proper divisors (1).

251341154161 is an equidigital number, since it uses as much as digits as its factorization.

251341154161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 34.

The spelling of 251341154161 in words is "two hundred fifty-one billion, three hundred forty-one million, one hundred fifty-four thousand, one hundred sixty-one".