2003203523 has 4 divisors (see below), whose sum is σ = 2005020768. Its totient is φ = 2001386280.

The previous prime is 2003203511. The next prime is 2003203541. The reversal of 2003203523 is 3253023002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2003203523 - 2¹² = 2003199427 is a prime.

It is a super-2 number, since 2×2003203523² = 8025648709119223058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2003203495 and 2003203504.

It is not an unprimeable number, because it can be changed into a prime (2083203523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 906968 + ... + 909173.

It is an arithmetic number, because the mean of its divisors is an integer number (501255192).

Almost surely, 2^2003203523 is an apocalyptic number.

2003203523 is a deficient number, since it is larger than the sum of its proper divisors (1817245).

2003203523 is a wasteful number, since it uses less digits than its factorization.

2003203523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817244.

The product of its (nonzero) digits is 1080, while the sum is 20.

The square root of 2003203523 is about 44757.1616950852. The cubic root of 2003203523 is about 1260.5933887240.

Adding to 2003203523 its reverse (3253023002), we get a palindrome (5256226525).

The spelling of 2003203523 in words is "two billion, three million, two hundred three thousand, five hundred twenty-three".