25225431 has 16 divisors (see below), whose sum is σ = 41933568. Its totient is φ = 13104000.

The previous prime is 25225397. The next prime is 25225441. The reversal of 25225431 is 13452252.

It is not a de Polignac number, because 25225431 - 2⁶ = 25225367 is a prime.

It is a super-2 number, since 2×25225431² = 1272644738271522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25225441) 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, 54370 + ... + 54831.

It is an arithmetic number, because the mean of its divisors is an integer number (2620848).

Almost surely, 2^25225431 is an apocalyptic number.

25225431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25225431 is a deficient number, since it is larger than the sum of its proper divisors (16708137).

25225431 is a wasteful number, since it uses less digits than its factorization.

25225431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109222.

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

The square root of 25225431 is about 5022.4925087052. The cubic root of 25225431 is about 293.2780309255.

Adding to 25225431 its reverse (13452252), we get a palindrome (38677683).

It can be divided in two parts, 25 and 225431, that added together give a triangular number (225456 = T₆₇₁).

The spelling of 25225431 in words is "twenty-five million, two hundred twenty-five thousand, four hundred thirty-one".