203230805 has 4 divisors (see below), whose sum is σ = 243876972. Its totient is φ = 162584640.

The previous prime is 203230799. The next prime is 203230813. The reversal of 203230805 is 508032302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508032302 = 2 ⋅254016151.

It can be written as a sum of positive squares in 2 ways, for example, as 69989956 + 133240849 = 8366^2 + 11543^2 .

It is not a de Polignac number, because 203230805 - 2⁴ = 203230789 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 3 ways as a sum of consecutive naturals, for example, 20323076 + ... + 20323085.

It is an arithmetic number, because the mean of its divisors is an integer number (60969243).

Almost surely, 2^203230805 is an apocalyptic number.

It is an amenable number.

203230805 is a deficient number, since it is larger than the sum of its proper divisors (40646167).

203230805 is an equidigital number, since it uses as much as digits as its factorization.

203230805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40646166.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 203230805 is about 14255.9042154470. The cubic root of 203230805 is about 587.9357190208.

The spelling of 203230805 in words is "two hundred three million, two hundred thirty thousand, eight hundred five".