253435251 has 4 divisors (see below), whose sum is σ = 337913672. Its totient is φ = 168956832.

The previous prime is 253435141. The next prime is 253435289. The reversal of 253435251 is 152534352.

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

It is not a de Polignac number, because 253435251 - 2⁷ = 253435123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253431251) 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, 42239206 + ... + 42239211.

It is an arithmetic number, because the mean of its divisors is an integer number (84478418).

Almost surely, 2^253435251 is an apocalyptic number.

253435251 is a deficient number, since it is larger than the sum of its proper divisors (84478421).

253435251 is an equidigital number, since it uses as much as digits as its factorization.

253435251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84478420.

The product of its digits is 18000, while the sum is 30.

The square root of 253435251 is about 15919.6498391139. The cubic root of 253435251 is about 632.8328387196.

The spelling of 253435251 in words is "two hundred fifty-three million, four hundred thirty-five thousand, two hundred fifty-one".