251325616 has 20 divisors (see below), whose sum is σ = 512572600. Its totient is φ = 119048832.

The previous prime is 251325563. The next prime is 251325617. The reversal of 251325616 is 616523152.

It is not an unprimeable number, because it can be changed into a prime (251325617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413061 + ... + 413668.

It is an arithmetic number, because the mean of its divisors is an integer number (25628630).

Almost surely, 2^251325616 is an apocalyptic number.

It is an amenable number.

251325616 is an abundant number, since it is smaller than the sum of its proper divisors (261246984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251325616 is a wasteful number, since it uses less digits than its factorization.

251325616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826756 (or 826750 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 251325616 is about 15853.2525369402. The cubic root of 251325616 is about 631.0720103873.

Adding to 251325616 its reverse (616523152), we get a palindrome (867848768).

The spelling of 251325616 in words is "two hundred fifty-one million, three hundred twenty-five thousand, six hundred sixteen".