203120045 has 8 divisors (see below), whose sum is σ = 243826200. Its totient is φ = 162441280.

The previous prime is 203120039. The next prime is 203120053. The reversal of 203120045 is 540021302.

It can be written as a sum of positive squares in 4 ways, for example, as 1990921 + 201129124 = 1411^2 + 14182^2 .

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

It is not a de Polignac number, because 203120045 - 2⁸ = 203119789 is a prime.

It is a congruent 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, 17075 + ... + 26415.

It is an arithmetic number, because the mean of its divisors is an integer number (30478275).

Almost surely, 2^203120045 is an apocalyptic number.

It is an amenable number.

203120045 is a deficient number, since it is larger than the sum of its proper divisors (40706155).

203120045 is an equidigital number, since it uses as much as digits as its factorization.

203120045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13695.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 203120045 is about 14252.0189797797. The cubic root of 203120045 is about 587.8288920499.

Adding to 203120045 its reverse (540021302), we get a palindrome (743141347).

The spelling of 203120045 in words is "two hundred three million, one hundred twenty thousand, forty-five".