25425231 has 16 divisors (see below), whose sum is σ = 36849120. Its totient is φ = 15500160.

The previous prime is 25425223. The next prime is 25425269. The reversal of 25425231 is 13252452.

It is not a de Polignac number, because 25425231 - 2³ = 25425223 is a prime.

It is a super-2 number, since 2×25425231² = 1292884742806722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25425271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1261 + ... + 7241.

It is an arithmetic number, because the mean of its divisors is an integer number (2303070).

Almost surely, 2^25425231 is an apocalyptic number.

25425231 is a deficient number, since it is larger than the sum of its proper divisors (11423889).

25425231 is a wasteful number, since it uses less digits than its factorization.

25425231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6106.

The product of its digits is 2400, while the sum is 24.

The square root of 25425231 is about 5042.3438002580. The cubic root of 25425231 is about 294.0503060754.

Adding to 25425231 its reverse (13252452), we get a palindrome (38677683).

The spelling of 25425231 in words is "twenty-five million, four hundred twenty-five thousand, two hundred thirty-one".