25430203 has 4 divisors (see below), whose sum is σ = 26535888. Its totient is φ = 24324520.

The previous prime is 25430191. The next prime is 25430213. The reversal of 25430203 is 30203452.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25430203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25430213) 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, 552808 + ... + 552853.

It is an arithmetic number, because the mean of its divisors is an integer number (6633972).

Almost surely, 2^25430203 is an apocalyptic number.

25430203 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25430203 is a deficient number, since it is larger than the sum of its proper divisors (1105685).

25430203 is a wasteful number, since it uses less digits than its factorization.

25430203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105684.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 25430203 is about 5042.8368008493. The cubic root of 25430203 is about 294.0694723756.

Adding to 25430203 its reverse (30203452), we get a palindrome (55633655).

The spelling of 25430203 in words is "twenty-five million, four hundred thirty thousand, two hundred three".