203243123219 has 4 divisors (see below), whose sum is σ = 206574977760. Its totient is φ = 199911268680.

The previous prime is 203243123207. The next prime is 203243123233. The reversal of 203243123219 is 912321342302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203243123219 is a prime.

It is a super-2 number, since 2×203243123219² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203243123249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1665927179 + ... + 1665927300.

It is an arithmetic number, because the mean of its divisors is an integer number (51643744440).

Almost surely, 2^203243123219 is an apocalyptic number.

203243123219 is a deficient number, since it is larger than the sum of its proper divisors (3331854541).

203243123219 is an equidigital number, since it uses as much as digits as its factorization.

203243123219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331854540.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 203243123219 in words is "two hundred three billion, two hundred forty-three million, one hundred twenty-three thousand, two hundred nineteen".