251253225 has 48 divisors (see below), whose sum is σ = 467976000. Its totient is φ = 132140160.

The previous prime is 251253193. The next prime is 251253229. The reversal of 251253225 is 522352152.

It is not a de Polignac number, because 251253225 - 2⁵ = 251253193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (251253229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46726 + ... + 51824.

It is an arithmetic number, because the mean of its divisors is an integer number (9749500).

Almost surely, 2^251253225 is an apocalyptic number.

251253225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251253225 is a deficient number, since it is larger than the sum of its proper divisors (216722775).

251253225 is a wasteful number, since it uses less digits than its factorization.

251253225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5191 (or 5180 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 251253225 is about 15850.9692132689. The cubic root of 251253225 is about 631.0114139367.

The spelling of 251253225 in words is "two hundred fifty-one million, two hundred fifty-three thousand, two hundred twenty-five".