251525255 has 4 divisors (see below), whose sum is σ = 301830312. Its totient is φ = 201220200.

The previous prime is 251525243. The next prime is 251525257. The reversal of 251525255 is 552525152.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 251525255 - 2⁶ = 251525191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251525257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25152521 + ... + 25152530.

It is an arithmetic number, because the mean of its divisors is an integer number (75457578).

Almost surely, 2^251525255 is an apocalyptic number.

251525255 is a deficient number, since it is larger than the sum of its proper divisors (50305057).

251525255 is an equidigital number, since it uses as much as digits as its factorization.

251525255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50305056.

The product of its digits is 25000, while the sum is 32.

The square root of 251525255 is about 15859.5477552167. The cubic root of 251525255 is about 631.2390622553.

The spelling of 251525255 in words is "two hundred fifty-one million, five hundred twenty-five thousand, two hundred fifty-five".