203113005 has 16 divisors (see below), whose sum is σ = 327542784. Its totient is φ = 107472960.

The previous prime is 203113003. The next prime is 203113051. The reversal of 203113005 is 500311302.

It is a happy number.

It is not a de Polignac number, because 203113005 - 2¹ = 203113003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203113003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51406 + ... + 55215.

It is an arithmetic number, because the mean of its divisors is an integer number (20471424).

Almost surely, 2^203113005 is an apocalyptic number.

It is an amenable number.

203113005 is a deficient number, since it is larger than the sum of its proper divisors (124429779).

203113005 is a wasteful number, since it uses less digits than its factorization.

203113005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106756.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 203113005 is about 14251.7719950889. The cubic root of 203113005 is about 587.8221007241.

Adding to 203113005 its reverse (500311302), we get a palindrome (703424307).

The spelling of 203113005 in words is "two hundred three million, one hundred thirteen thousand, five".