252640443 has 16 divisors (see below), whose sum is σ = 370288512. Its totient is φ = 151944000.

The previous prime is 252640433. The next prime is 252640459. The reversal of 252640443 is 344046252.

It is not a de Polignac number, because 252640443 - 2⁹ = 252639931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 252640443.

It is not an unprimeable number, because it can be changed into a prime (252640433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24898 + ... + 33543.

It is an arithmetic number, because the mean of its divisors is an integer number (23143032).

Almost surely, 2^252640443 is an apocalyptic number.

252640443 is a deficient number, since it is larger than the sum of its proper divisors (117648069).

252640443 is a wasteful number, since it uses less digits than its factorization.

252640443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58586.

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 252640443 is about 15894.6671245421. The cubic root of 252640443 is about 632.1705955043.

Adding to 252640443 its reverse (344046252), we get a palindrome (596686695).

The spelling of 252640443 in words is "two hundred fifty-two million, six hundred forty thousand, four hundred forty-three".