203211443243 has 4 divisors (see below), whose sum is σ = 212046723408. Its totient is φ = 194376163080.

The previous prime is 203211443233. The next prime is 203211443249. The reversal of 203211443243 is 342344112302.

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 203211443243 - 2²² = 203207248939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203211443249) 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, 4417640048 + ... + 4417640093.

It is an arithmetic number, because the mean of its divisors is an integer number (53011680852).

Almost surely, 2^203211443243 is an apocalyptic number.

203211443243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

203211443243 is a deficient number, since it is larger than the sum of its proper divisors (8835280165).

203211443243 is an equidigital number, since it uses as much as digits as its factorization.

203211443243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8835280164.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 203211443243 its reverse (342344112302), we get a palindrome (545555555545).

The spelling of 203211443243 in words is "two hundred three billion, two hundred eleven million, four hundred forty-three thousand, two hundred forty-three".