203105343 has 24 divisors (see below), whose sum is σ = 315642288. Its totient is φ = 115831296.

The previous prime is 203105333. The next prime is 203105347. The reversal of 203105343 is 343501302.

203105343 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 203105343 - 2¹⁴ = 203088959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203105347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97905 + ... + 99957.

It is an arithmetic number, because the mean of its divisors is an integer number (13151762).

Almost surely, 2^203105343 is an apocalyptic number.

203105343 is a deficient number, since it is larger than the sum of its proper divisors (112536945).

203105343 is a wasteful number, since it uses less digits than its factorization.

203105343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2743 (or 2736 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 203105343 is about 14251.5031838750. The cubic root of 203105343 is about 587.8147091909.

Adding to 203105343 its reverse (343501302), we get a palindrome (546606645).

The spelling of 203105343 in words is "two hundred three million, one hundred five thousand, three hundred forty-three".