253745251 has 4 divisors (see below), whose sum is σ = 253783512. Its totient is φ = 253706992.

The previous prime is 253745227. The next prime is 253745309. The reversal of 253745251 is 152547352.

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

It is a cyclic number.

It is not a de Polignac number, because 253745251 - 2⁷ = 253745123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253745651) 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, 6325 + ... + 23398.

It is an arithmetic number, because the mean of its divisors is an integer number (63445878).

Almost surely, 2^253745251 is an apocalyptic number.

253745251 is a deficient number, since it is larger than the sum of its proper divisors (38261).

253745251 is an equidigital number, since it uses as much as digits as its factorization.

253745251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38260.

The product of its digits is 42000, while the sum is 34.

The square root of 253745251 is about 15929.3832586199. The cubic root of 253745251 is about 633.0907589650.

It can be divided in two parts, 25374 and 5251, that added together give a square (30625 = 175²).

The spelling of 253745251 in words is "two hundred fifty-three million, seven hundred forty-five thousand, two hundred fifty-one".