251625089 has 2 divisors, whose sum is σ = 251625090. Its totient is φ = 251625088.

The previous prime is 251625019. The next prime is 251625131. The reversal of 251625089 is 980526152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155251600 + 96373489 = 12460^2 + 9817^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251625089 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (251625019) 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, 125812544 + 125812545.

It is an arithmetic number, because the mean of its divisors is an integer number (125812545).

Almost surely, 2^251625089 is an apocalyptic number.

It is an amenable number.

251625089 is a deficient number, since it is larger than the sum of its proper divisors (1).

251625089 is an equidigital number, since it uses as much as digits as its factorization.

251625089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 251625089 is about 15862.6948845396. The cubic root of 251625089 is about 631.3225671697.

The spelling of 251625089 in words is "two hundred fifty-one million, six hundred twenty-five thousand, eighty-nine".