203115023005 has 4 divisors (see below), whose sum is σ = 243738027612. Its totient is φ = 162492018400.

The previous prime is 203115023003. The next prime is 203115023017. The reversal of 203115023005 is 500320511302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500320511302 = 2 ⋅250160255651.

It can be written as a sum of positive squares in 2 ways, for example, as 69125348889 + 133989674116 = 262917^2 + 366046^2 .

It is not a de Polignac number, because 203115023005 - 2¹ = 203115023003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203115023003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20311502296 + ... + 20311502305.

It is an arithmetic number, because the mean of its divisors is an integer number (60934506903).

Almost surely, 2^203115023005 is an apocalyptic number.

It is an amenable number.

203115023005 is a deficient number, since it is larger than the sum of its proper divisors (40623004607).

203115023005 is an equidigital number, since it uses as much as digits as its factorization.

203115023005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40623004606.

The product of its (nonzero) digits is 900, while the sum is 22.

Adding to 203115023005 its reverse (500320511302), we get a palindrome (703435534307).

The spelling of 203115023005 in words is "two hundred three billion, one hundred fifteen million, twenty-three thousand, five".