251525983 has 2 divisors, whose sum is σ = 251525984. Its totient is φ = 251525982.

The previous prime is 251525977. The next prime is 251525993. The reversal of 251525983 is 389525152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251525983 - 2⁹ = 251525471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251525993) 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, 125762991 + 125762992.

It is an arithmetic number, because the mean of its divisors is an integer number (125762992).

Almost surely, 2^251525983 is an apocalyptic number.

251525983 is a deficient number, since it is larger than the sum of its proper divisors (1).

251525983 is an equidigital number, since it uses as much as digits as its factorization.

251525983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108000, while the sum is 40.

The square root of 251525983 is about 15859.5707066743. The cubic root of 251525983 is about 631.2396712619.

The spelling of 251525983 in words is "two hundred fifty-one million, five hundred twenty-five thousand, nine hundred eighty-three".