25225231 has 4 divisors (see below), whose sum is σ = 25907032. Its totient is φ = 24543432.

The previous prime is 25225201. The next prime is 25225237. The reversal of 25225231 is 13252252.

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

It is not a de Polignac number, because 25225231 - 2¹¹ = 25223183 is a prime.

It is a super-2 number, since 2×25225231² = 1272624558006722, 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 (25225237) 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, 340845 + ... + 340918.

It is an arithmetic number, because the mean of its divisors is an integer number (6476758).

Almost surely, 2^25225231 is an apocalyptic number.

25225231 is a deficient number, since it is larger than the sum of its proper divisors (681801).

25225231 is an equidigital number, since it uses as much as digits as its factorization.

25225231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681800.

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

The square root of 25225231 is about 5022.4725982329. The cubic root of 25225231 is about 293.2772558378.

Adding to 25225231 its reverse (13252252), we get a palindrome (38477483).

The spelling of 25225231 in words is "twenty-five million, two hundred twenty-five thousand, two hundred thirty-one".