203120005 has 24 divisors (see below), whose sum is σ = 269468640. Its totient is φ = 145761120.

The previous prime is 203119997. The next prime is 203120011. The reversal of 203120005 is 500021302.

203120005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 203120005 - 2³ = 203119997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1246054 + ... + 1246216.

It is an arithmetic number, because the mean of its divisors is an integer number (11227860).

Almost surely, 2^203120005 is an apocalyptic number.

It is an amenable number.

203120005 is a deficient number, since it is larger than the sum of its proper divisors (66348635).

203120005 is a wasteful number, since it uses less digits than its factorization.

203120005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 203120005 is about 14252.0175764697. The cubic root of 203120005 is about 587.8288534633.

Adding to 203120005 its reverse (500021302), we get a palindrome (703141307).

The spelling of 203120005 in words is "two hundred three million, one hundred twenty thousand, five".