251200225 has 6 divisors (see below), whose sum is σ = 311488310. Its totient is φ = 200960160.

The previous prime is 251200217. The next prime is 251200237. The reversal of 251200225 is 522002152.

251200225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 62742241 + 188457984 = 7921^2 + 13728^2 .

It is not a de Polignac number, because 251200225 - 2³ = 251200217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5023980 + ... + 5024029.

Almost surely, 2^251200225 is an apocalyptic number.

251200225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251200225 is a deficient number, since it is larger than the sum of its proper divisors (60288085).

251200225 is a wasteful number, since it uses less digits than its factorization.

251200225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10048019 (or 10048014 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 251200225 is about 15849.2973030352. The cubic root of 251200225 is about 630.9670417610.

Adding to 251200225 its reverse (522002152), we get a palindrome (773202377).

The spelling of 251200225 in words is "two hundred fifty-one million, two hundred thousand, two hundred twenty-five".