251059967 has 2 divisors, whose sum is σ = 251059968. Its totient is φ = 251059966.

The previous prime is 251059943. The next prime is 251059969. The reversal of 251059967 is 769950152.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251059967 - 2⁶ = 251059903 is a prime.

It is a super-2 number, since 2×251059967² = 126062214060082178, which contains 22 as substring.

Together with 251059969, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251059969) 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, 125529983 + 125529984.

It is an arithmetic number, because the mean of its divisors is an integer number (125529984).

Almost surely, 2^251059967 is an apocalyptic number.

251059967 is a deficient number, since it is larger than the sum of its proper divisors (1).

251059967 is an equidigital number, since it uses as much as digits as its factorization.

251059967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170100, while the sum is 44.

The square root of 251059967 is about 15844.8719464690. The cubic root of 251059967 is about 630.8495861185.

The spelling of 251059967 in words is "two hundred fifty-one million, fifty-nine thousand, nine hundred sixty-seven".