15225239 has 2 divisors, whose sum is σ = 15225240. Its totient is φ = 15225238.

The previous prime is 15225233. The next prime is 15225253. The reversal of 15225239 is 93252251.

15225239 is nontrivially palindromic in base 13.

15225239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15225239 - 2⁸ = 15224983 is a prime.

It is a super-4 number, since 4×15225239⁴ (a number of 30 digits) contains 4444 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15225233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7612619 + 7612620.

It is an arithmetic number, because the mean of its divisors is an integer number (7612620).

Almost surely, 2^15225239 is an apocalyptic number.

15225239 is a deficient number, since it is larger than the sum of its proper divisors (1).

15225239 is an equidigital number, since it uses as much as digits as its factorization.

15225239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 29.

The square root of 15225239 is about 3901.9532288330. The cubic root of 15225239 is about 247.8494957003.

The spelling of 15225239 in words is "fifteen million, two hundred twenty-five thousand, two hundred thirty-nine".