251428607 has 2 divisors, whose sum is σ = 251428608. Its totient is φ = 251428606.

The previous prime is 251428603. The next prime is 251428633. The reversal of 251428607 is 706824152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251428607 - 2² = 251428603 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251428601) 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, 125714303 + 125714304.

It is an arithmetic number, because the mean of its divisors is an integer number (125714304).

Almost surely, 2^251428607 is an apocalyptic number.

251428607 is a deficient number, since it is larger than the sum of its proper divisors (1).

251428607 is an equidigital number, since it uses as much as digits as its factorization.

251428607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 251428607 is about 15856.5004651089. The cubic root of 251428607 is about 631.1582011789.

The spelling of 251428607 in words is "two hundred fifty-one million, four hundred twenty-eight thousand, six hundred seven".