25530203 has 4 divisors (see below), whose sum is σ = 25756248. Its totient is φ = 25304160.

The previous prime is 25530191. The next prime is 25530247. The reversal of 25530203 is 30203552.

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 25530203 - 2⁴ = 25530187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25530293) 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, 112853 + ... + 113078.

It is an arithmetic number, because the mean of its divisors is an integer number (6439062).

Almost surely, 2^25530203 is an apocalyptic number.

25530203 is a deficient number, since it is larger than the sum of its proper divisors (226045).

25530203 is a wasteful number, since it uses less digits than its factorization.

25530203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226044.

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 25530203 is about 5052.7421268060. The cubic root of 25530203 is about 294.4544278197.

Adding to 25530203 its reverse (30203552), we get a palindrome (55733755).

It can be divided in two parts, 25530 and 203, that multiplied together give a triangular number (5182590 = T₃₂₁₉).

The spelling of 25530203 in words is "twenty-five million, five hundred thirty thousand, two hundred three".