15525241 has 4 divisors (see below), whose sum is σ = 15536500. Its totient is φ = 15513984.

The previous prime is 15525229. The next prime is 15525247. The reversal of 15525241 is 14252551.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14252551 = 3701 ⋅3851.

It can be written as a sum of positive squares in 2 ways, for example, as 9174841 + 6350400 = 3029^2 + 2520^2 .

It is a 3-Lehmer number, since φ(15525241) divides (15525241-1)³.

It is a cyclic number.

It is not a de Polignac number, because 15525241 - 2¹³ = 15517049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15525247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3216 + ... + 6433.

It is an arithmetic number, because the mean of its divisors is an integer number (3884125).

It is a Poulet number, since it divides 2^15525240-1.

Almost surely, 2^15525241 is an apocalyptic number.

It is an amenable number.

15525241 is a deficient number, since it is larger than the sum of its proper divisors (11259).

15525241 is an equidigital number, since it uses as much as digits as its factorization.

15525241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11258.

The product of its digits is 2000, while the sum is 25.

The square root of 15525241 is about 3940.2082432278. The cubic root of 15525241 is about 249.4668156663.

Adding to 15525241 its reverse (14252551), we get a palindrome (29777792).

The spelling of 15525241 in words is "fifteen million, five hundred twenty-five thousand, two hundred forty-one".