251153255 has 4 divisors (see below), whose sum is σ = 301383912. Its totient is φ = 200922600.

The previous prime is 251153251. The next prime is 251153281. The reversal of 251153255 is 552351152.

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

It is not a de Polignac number, because 251153255 - 2² = 251153251 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 (251153251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25115321 + ... + 25115330.

It is an arithmetic number, because the mean of its divisors is an integer number (75345978).

Almost surely, 2^251153255 is an apocalyptic number.

251153255 is a deficient number, since it is larger than the sum of its proper divisors (50230657).

251153255 is an equidigital number, since it uses as much as digits as its factorization.

251153255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50230656.

The product of its digits is 7500, while the sum is 29.

The square root of 251153255 is about 15847.8154645995. The cubic root of 251153255 is about 630.9277127499.

The spelling of 251153255 in words is "two hundred fifty-one million, one hundred fifty-three thousand, two hundred fifty-five".