203131140423443 has 4 divisors (see below), whose sum is σ = 210135662507040. Its totient is φ = 196126618339848.

The previous prime is 203131140423427. The next prime is 203131140423517. The reversal of 203131140423443 is 344324041131302.

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 203131140423443 - 2⁴ = 203131140423427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203131140422443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3502261041755 + ... + 3502261041812.

It is an arithmetic number, because the mean of its divisors is an integer number (52533915626760).

Almost surely, 2^{203131140423443} is an apocalyptic number.

203131140423443 is a deficient number, since it is larger than the sum of its proper divisors (7004522083597).

203131140423443 is an equidigital number, since it uses as much as digits as its factorization.

203131140423443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7004522083596.

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 203131140423443 its reverse (344324041131302), we get a palindrome (547455181554745).

The spelling of 203131140423443 in words is "two hundred three trillion, one hundred thirty-one billion, one hundred forty million, four hundred twenty-three thousand, four hundred forty-three".