251096551 has 2 divisors, whose sum is σ = 251096552. Its totient is φ = 251096550.

The previous prime is 251096491. The next prime is 251096617. The reversal of 251096551 is 155690152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251096551 - 2¹⁷ = 250965479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251090551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125548275 + 125548276.

It is an arithmetic number, because the mean of its divisors is an integer number (125548276).

Almost surely, 2^251096551 is an apocalyptic number.

251096551 is a deficient number, since it is larger than the sum of its proper divisors (1).

251096551 is an equidigital number, since it uses as much as digits as its factorization.

251096551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13500, while the sum is 34.

The square root of 251096551 is about 15846.0263473213. The cubic root of 251096551 is about 630.8802267135.

The spelling of 251096551 in words is "two hundred fifty-one million, ninety-six thousand, five hundred fifty-one".