2003221525 has 12 divisors (see below), whose sum is σ = 2484564192. Its totient is φ = 1602209840.

The previous prime is 2003221481. The next prime is 2003221531. The reversal of 2003221525 is 5251223002.

It is not a de Polignac number, because 2003221525 - 2⁹ = 2003221013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2003221496 and 2003221505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172554 + ... + 183796.

It is an arithmetic number, because the mean of its divisors is an integer number (207047016).

Almost surely, 2^2003221525 is an apocalyptic number.

2003221525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2003221525 is a deficient number, since it is larger than the sum of its proper divisors (481342667).

2003221525 is a wasteful number, since it uses less digits than its factorization.

2003221525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18380 (or 18375 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 2003221525 is about 44757.3628021134. The cubic root of 2003221525 is about 1260.5971648645.

Adding to 2003221525 its reverse (5251223002), we get a palindrome (7254444527).

The spelling of 2003221525 in words is "two billion, three million, two hundred twenty-one thousand, five hundred twenty-five".