251225512 has 32 divisors (see below), whose sum is σ = 483706080. Its totient is φ = 122274880.

The previous prime is 251225503. The next prime is 251225561. The reversal of 251225512 is 215522152.

It is a super-2 number, since 2×251225512² = 126228515759324288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53283 + ... + 57805.

It is an arithmetic number, because the mean of its divisors is an integer number (15115815).

Almost surely, 2^251225512 is an apocalyptic number.

It is an amenable number.

251225512 is a deficient number, since it is larger than the sum of its proper divisors (232480568).

251225512 is a wasteful number, since it uses less digits than its factorization.

251225512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4713 (or 4709 counting only the distinct ones).

The product of its digits is 2000, while the sum is 25.

The square root of 251225512 is about 15850.0950154881. The cubic root of 251225512 is about 630.9882130905.

Adding to 251225512 its reverse (215522152), we get a palindrome (466747664).

The spelling of 251225512 in words is "two hundred fifty-one million, two hundred twenty-five thousand, five hundred twelve".