203540345 has 8 divisors (see below), whose sum is σ = 244378176. Its totient is φ = 162745776.

The previous prime is 203540339. The next prime is 203540353. The reversal of 203540345 is 543045302.

203540345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 203540345 - 2⁸ = 203540089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 644 + ... + 20186.

It is an arithmetic number, because the mean of its divisors is an integer number (30547272).

Almost surely, 2^203540345 is an apocalyptic number.

It is an amenable number.

203540345 is a deficient number, since it is larger than the sum of its proper divisors (40837831).

203540345 is a wasteful number, since it uses less digits than its factorization.

203540345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21631.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 203540345 is about 14266.7566391244. The cubic root of 203540345 is about 588.2340617592.

Adding to 203540345 its reverse (543045302), we get a palindrome (746585647).

The spelling of 203540345 in words is "two hundred three million, five hundred forty thousand, three hundred forty-five".