251230051 has 2 divisors, whose sum is σ = 251230052. Its totient is φ = 251230050.

The previous prime is 251230043. The next prime is 251230069. The reversal of 251230051 is 150032152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251230051 - 2³ = 251230043 is a prime.

It is not a weakly prime, because it can be changed into another prime (251230351) 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, 125615025 + 125615026.

It is an arithmetic number, because the mean of its divisors is an integer number (125615026).

Almost surely, 2^251230051 is an apocalyptic number.

251230051 is a deficient number, since it is larger than the sum of its proper divisors (1).

251230051 is an equidigital number, since it uses as much as digits as its factorization.

251230051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 251230051 is about 15850.2382001029. The cubic root of 251230051 is about 630.9920131800.

The spelling of 251230051 in words is "two hundred fifty-one million, two hundred thirty thousand, fifty-one".