25224439 has 2 divisors, whose sum is σ = 25224440. Its totient is φ = 25224438.

The previous prime is 25224431. The next prime is 25224487. The reversal of 25224439 is 93442252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25224439 - 2³ = 25224431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25224439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25224431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12612219 + 12612220.

It is an arithmetic number, because the mean of its divisors is an integer number (12612220).

Almost surely, 2^25224439 is an apocalyptic number.

25224439 is a deficient number, since it is larger than the sum of its proper divisors (1).

25224439 is an equidigital number, since it uses as much as digits as its factorization.

25224439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 31.

The square root of 25224439 is about 5022.3937519872. The cubic root of 25224439 is about 293.2741864504.

The spelling of 25224439 in words is "twenty-five million, two hundred twenty-four thousand, four hundred thirty-nine".