253243430 has 32 divisors (see below), whose sum is σ = 498659328. Its totient is φ = 91832800.

The previous prime is 253243421. The next prime is 253243447. The reversal of 253243430 is 34342352.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 253243430.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39125 + ... + 45135.

It is an arithmetic number, because the mean of its divisors is an integer number (15583104).

Almost surely, 2^253243430 is an apocalyptic number.

253243430 is a deficient number, since it is larger than the sum of its proper divisors (245415898).

253243430 is a wasteful number, since it uses less digits than its factorization.

253243430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6412.

The product of its (nonzero) digits is 8640, while the sum is 26.

The square root of 253243430 is about 15913.6240372833. The cubic root of 253243430 is about 632.6731381431.

Adding to 253243430 its reverse (34342352), we get a palindrome (287585782).

The spelling of 253243430 in words is "two hundred fifty-three million, two hundred forty-three thousand, four hundred thirty".