251253255 has 32 divisors (see below), whose sum is σ = 439262208. Its totient is φ = 121622400.

The previous prime is 251253241. The next prime is 251253281. The reversal of 251253255 is 552352152.

It is not a de Polignac number, because 251253255 - 2¹¹ = 251251207 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202497 + ... + 203733.

It is an arithmetic number, because the mean of its divisors is an integer number (13726944).

Almost surely, 2^251253255 is an apocalyptic number.

251253255 is a deficient number, since it is larger than the sum of its proper divisors (188008953).

251253255 is a wasteful number, since it uses less digits than its factorization.

251253255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487.

The product of its digits is 15000, while the sum is 30.

The square root of 251253255 is about 15850.9701595833. The cubic root of 251253255 is about 631.0114390513.

The spelling of 251253255 in words is "two hundred fifty-one million, two hundred fifty-three thousand, two hundred fifty-five".