253404243 has 24 divisors (see below), whose sum is σ = 374087168. Its totient is φ = 165255552.

The previous prime is 253404209. The next prime is 253404269. The reversal of 253404243 is 342404352.

253404243 is a `hidden beast` number, since 253 + 404 + 2 + 4 + 3 = 666.

253404243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 253404243 - 2⁸ = 253403987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253404443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81921 + ... + 84957.

Almost surely, 2^253404243 is an apocalyptic number.

253404243 is a deficient number, since it is larger than the sum of its proper divisors (120682925).

253404243 is a wasteful number, since it uses less digits than its factorization.

253404243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243 (or 3240 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

The square root of 253404243 is about 15918.6759185555. The cubic root of 253404243 is about 632.8070284703.

Adding to 253404243 its reverse (342404352), we get a palindrome (595808595).

It can be divided in two parts, 253 and 404243, that added together give a square (404496 = 636²).

The spelling of 253404243 in words is "two hundred fifty-three million, four hundred four thousand, two hundred forty-three".