15225439 has 2 divisors, whose sum is σ = 15225440. Its totient is φ = 15225438.

The previous prime is 15225407. The next prime is 15225443. The reversal of 15225439 is 93452251.

It is a strong prime.

It is an emirp because it is prime and its reverse (93452251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15225439 - 2⁵ = 15225407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15225439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15225449) 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, 7612719 + 7612720.

It is an arithmetic number, because the mean of its divisors is an integer number (7612720).

Almost surely, 2^15225439 is an apocalyptic number.

15225439 is a deficient number, since it is larger than the sum of its proper divisors (1).

15225439 is an equidigital number, since it uses as much as digits as its factorization.

15225439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 31.

The square root of 15225439 is about 3901.9788569391. The cubic root of 15225439 is about 247.8505809527.

The spelling of 15225439 in words is "fifteen million, two hundred twenty-five thousand, four hundred thirty-nine".