203243443213 has 32 divisors (see below), whose sum is σ = 221551626240. Its totient is φ = 185825456640.

The previous prime is 203243443201. The next prime is 203243443231. The reversal of 203243443213 is 312344342302.

It is a happy number.

It is not a de Polignac number, because 203243443213 - 2¹⁷ = 203243312141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203243443283) 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, 24509598 + ... + 24517888.

It is an arithmetic number, because the mean of its divisors is an integer number (6923488320).

Almost surely, 2^203243443213 is an apocalyptic number.

It is an amenable number.

203243443213 is a deficient number, since it is larger than the sum of its proper divisors (18308183027).

203243443213 is a wasteful number, since it uses less digits than its factorization.

203243443213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8737.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 203243443213 its reverse (312344342302), we get a palindrome (515587785515).

The spelling of 203243443213 in words is "two hundred three billion, two hundred forty-three million, four hundred forty-three thousand, two hundred thirteen".