251052251 has 2 divisors, whose sum is σ = 251052252. Its totient is φ = 251052250.

The previous prime is 251052227. The next prime is 251052259. The reversal of 251052251 is 152250152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251052251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (251052259) 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, 125526125 + 125526126.

It is an arithmetic number, because the mean of its divisors is an integer number (125526126).

Almost surely, 2^251052251 is an apocalyptic number.

251052251 is a deficient number, since it is larger than the sum of its proper divisors (1).

251052251 is an equidigital number, since it uses as much as digits as its factorization.

251052251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 251052251 is about 15844.6284588816. The cubic root of 251052251 is about 630.8431232730.

The spelling of 251052251 in words is "two hundred fifty-one million, fifty-two thousand, two hundred fifty-one".