203243212443 has 32 divisors (see below), whose sum is σ = 283603783680. Its totient is φ = 129333923840.

The previous prime is 203243212433. The next prime is 203243212451. The reversal of 203243212443 is 344212342302.

It is a cyclic number.

It is not a de Polignac number, because 203243212443 - 2²⁶ = 203176103579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203243212443.

It is not an unprimeable number, because it can be changed into a prime (203243212433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29126971 + ... + 29133947.

It is an arithmetic number, because the mean of its divisors is an integer number (8862618240).

Almost surely, 2^203243212443 is an apocalyptic number.

203243212443 is a deficient number, since it is larger than the sum of its proper divisors (80360571237).

203243212443 is a wasteful number, since it uses less digits than its factorization.

203243212443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12107.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 203243212443 its reverse (344212342302), we get a palindrome (547455554745).

The spelling of 203243212443 in words is "two hundred three billion, two hundred forty-three million, two hundred twelve thousand, four hundred forty-three".