203343432431 has 4 divisors (see below), whose sum is σ = 203345171832. Its totient is φ = 203341693032.

The previous prime is 203343432389. The next prime is 203343432451. The reversal of 203343432431 is 134234343302.

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 203343432431 - 2²² = 203339238127 is a prime.

It is a super-2 number, since 2×203343432431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203343432451) 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, 680645 + ... + 932718.

It is an arithmetic number, because the mean of its divisors is an integer number (50836292958).

Almost surely, 2^203343432431 is an apocalyptic number.

203343432431 is a deficient number, since it is larger than the sum of its proper divisors (1739401).

203343432431 is a wasteful number, since it uses less digits than its factorization.

203343432431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739400.

The product of its (nonzero) digits is 62208, while the sum is 32.

Adding to 203343432431 its reverse (134234343302), we get a palindrome (337577775733).

The spelling of 203343432431 in words is "two hundred three billion, three hundred forty-three million, four hundred thirty-two thousand, four hundred thirty-one".