25530003 has 24 divisors (see below), whose sum is σ = 38678640. Its totient is φ = 16208640.

The previous prime is 25529993. The next prime is 25530007. The reversal of 25530003 is 30003552.

It is not a de Polignac number, because 25530003 - 2²⁰ = 24481427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25530007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15063 + ... + 16671.

It is an arithmetic number, because the mean of its divisors is an integer number (1611610).

Almost surely, 2^25530003 is an apocalyptic number.

25530003 is a deficient number, since it is larger than the sum of its proper divisors (13148637).

25530003 is a wasteful number, since it uses less digits than its factorization.

25530003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699 (or 1696 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 18.

The square root of 25530003 is about 5052.7223355336. The cubic root of 25530003 is about 294.4536589129.

Adding to 25530003 its reverse (30003552), we get a palindrome (55533555).

The spelling of 25530003 in words is "twenty-five million, five hundred thirty thousand, three".