25430231 has 4 divisors (see below), whose sum is σ = 25441200. Its totient is φ = 25419264.

The previous prime is 25430213. The next prime is 25430233. The reversal of 25430231 is 13203452.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25430231 is a prime.

It is a super-2 number, since 2×25430231² = 1293393297426722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25430233) 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, 491 + ... + 7148.

It is an arithmetic number, because the mean of its divisors is an integer number (6360300).

Almost surely, 2^25430231 is an apocalyptic number.

25430231 is a deficient number, since it is larger than the sum of its proper divisors (10969).

25430231 is an equidigital number, since it uses as much as digits as its factorization.

25430231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10968.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 25430231 is about 5042.8395770637. The cubic root of 25430231 is about 294.0695803042.

Adding to 25430231 its reverse (13203452), we get a palindrome (38633683).

The spelling of 25430231 in words is "twenty-five million, four hundred thirty thousand, two hundred thirty-one".