203130445 has 16 divisors (see below), whose sum is σ = 287566848. Its totient is φ = 134795520.

The previous prime is 203130401. The next prime is 203130469. The reversal of 203130445 is 544031302.

It is not a de Polignac number, because 203130445 - 2¹⁵ = 203097677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92524 + ... + 94693.

It is an arithmetic number, because the mean of its divisors is an integer number (17972928).

Almost surely, 2^203130445 is an apocalyptic number.

It is an amenable number.

203130445 is a deficient number, since it is larger than the sum of its proper divisors (84436403).

203130445 is a wasteful number, since it uses less digits than its factorization.

203130445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187260.

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

The square root of 203130445 is about 14252.3838356957. The cubic root of 203130445 is about 587.8389244032.

Adding to 203130445 its reverse (544031302), we get a palindrome (747161747).

It can be divided in two parts, 20313044 and 5, that added together give a square (20313049 = 4507²).

The spelling of 203130445 in words is "two hundred three million, one hundred thirty thousand, four hundred forty-five".