251264525325 has 72 divisors (see below), whose sum is σ = 459016954368. Its totient is φ = 121186560000.

The previous prime is 251264525321. The next prime is 251264525359. The reversal of 251264525325 is 523525462152.

It is not a de Polignac number, because 251264525325 - 2² = 251264525321 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251264525321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1660845 + ... + 1805805.

Almost surely, 2^251264525325 is an apocalyptic number.

251264525325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251264525325 is a deficient number, since it is larger than the sum of its proper divisors (207752429043).

251264525325 is a wasteful number, since it uses less digits than its factorization.

251264525325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145187 (or 145171 counting only the distinct ones).

The product of its digits is 720000, while the sum is 42.

Adding to 251264525325 its reverse (523525462152), we get a palindrome (774789987477).

The spelling of 251264525325 in words is "two hundred fifty-one billion, two hundred sixty-four million, five hundred twenty-five thousand, three hundred twenty-five".