203431045 has 4 divisors (see below), whose sum is σ = 244117260. Its totient is φ = 162744832.

The previous prime is 203431031. The next prime is 203431057. The reversal of 203431045 is 540134302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30008484 + 173422561 = 5478^2 + 13169^2 .

It is a cyclic number.

It is not a de Polignac number, because 203431045 - 2⁹ = 203430533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20343100 + ... + 20343109.

It is an arithmetic number, because the mean of its divisors is an integer number (61029315).

Almost surely, 2^203431045 is an apocalyptic number.

It is an amenable number.

203431045 is a deficient number, since it is larger than the sum of its proper divisors (40686215).

203431045 is an equidigital number, since it uses as much as digits as its factorization.

203431045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40686214.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 203431045 is about 14262.9255414168. The cubic root of 203431045 is about 588.1287501318.

Adding to 203431045 its reverse (540134302), we get a palindrome (743565347).

The spelling of 203431045 in words is "two hundred three million, four hundred thirty-one thousand, forty-five".