203031240043 has 4 divisors (see below), whose sum is σ = 204893912080. Its totient is φ = 201168568008.

The previous prime is 203031240019. The next prime is 203031240073. The reversal of 203031240043 is 340042130302.

It is a happy number.

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 203031240043 - 2⁵ = 203031240011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203031239996 and 203031240023.

It is not an unprimeable number, because it can be changed into a prime (203031240073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 931335855 + ... + 931336072.

It is an arithmetic number, because the mean of its divisors is an integer number (51223478020).

Almost surely, 2^203031240043 is an apocalyptic number.

203031240043 is a deficient number, since it is larger than the sum of its proper divisors (1862672037).

203031240043 is a wasteful number, since it uses less digits than its factorization.

203031240043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862672036.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 203031240043 its reverse (340042130302), we get a palindrome (543073370345).

The spelling of 203031240043 in words is "two hundred three billion, thirty-one million, two hundred forty thousand, forty-three".