203530105 has 12 divisors (see below), whose sum is σ = 255320100. Its totient is φ = 155742752.

The previous prime is 203530087. The next prime is 203530181. The reversal of 203530105 is 501035302.

It can be written as a sum of positive squares in 2 ways, for example, as 106172416 + 97357689 = 10304^2 + 9867^2 .

It is not a de Polignac number, because 203530105 - 2¹⁵ = 203497337 is a prime.

It is a super-2 number, since 2×203530105² = 82849007282622050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35830 + ... + 41119.

It is an arithmetic number, because the mean of its divisors is an integer number (21276675).

Almost surely, 2^203530105 is an apocalyptic number.

It is an amenable number.

203530105 is a deficient number, since it is larger than the sum of its proper divisors (51789995).

203530105 is an equidigital number, since it uses as much as digits as its factorization.

203530105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77000 (or 76977 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 203530105 is about 14266.3977583691. The cubic root of 203530105 is about 588.2241970191.

Adding to 203530105 its reverse (501035302), we get a palindrome (704565407).

The spelling of 203530105 in words is "two hundred three million, five hundred thirty thousand, one hundred five".