203343431 has 4 divisors (see below), whose sum is σ = 208072392. Its totient is φ = 198614472.

The previous prime is 203343407. The next prime is 203343451. The reversal of 203343431 is 134343302.

203343431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 203343431 - 2⁶ = 203343367 is a prime.

It is a super-2 number, since 2×203343431² = 82697101861703522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203343397 and 203343406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203343451) 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, 2364416 + ... + 2364501.

It is an arithmetic number, because the mean of its divisors is an integer number (52018098).

Almost surely, 2^203343431 is an apocalyptic number.

203343431 is a deficient number, since it is larger than the sum of its proper divisors (4728961).

203343431 is an equidigital number, since it uses as much as digits as its factorization.

203343431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4728960.

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 203343431 is about 14259.8538211301. The cubic root of 203343431 is about 588.0443059385.

Adding to 203343431 its reverse (134343302), we get a palindrome (337686733).

The spelling of 203343431 in words is "two hundred three million, three hundred forty-three thousand, four hundred thirty-one".