251010163 has 2 divisors, whose sum is σ = 251010164. Its totient is φ = 251010162.

The previous prime is 251010161. The next prime is 251010191. The reversal of 251010163 is 361010152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251010163 - 2¹ = 251010161 is a prime.

It is a super-2 number, since 2×251010163² = 126012203858573138, which contains 22 as substring.

Together with 251010161, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 251010163.

It is not a weakly prime, because it can be changed into another prime (251010161) 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, 125505081 + 125505082.

It is an arithmetic number, because the mean of its divisors is an integer number (125505082).

Almost surely, 2^251010163 is an apocalyptic number.

251010163 is a deficient number, since it is larger than the sum of its proper divisors (1).

251010163 is an equidigital number, since it uses as much as digits as its factorization.

251010163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 251010163 is about 15843.3002559442. The cubic root of 251010163 is about 630.8078684484.

The spelling of 251010163 in words is "two hundred fifty-one million, ten thousand, one hundred sixty-three".