15225541 has 4 divisors (see below), whose sum is σ = 15246412. Its totient is φ = 15204672.

The previous prime is 15225533. The next prime is 15225547. The reversal of 15225541 is 14552251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4532641 + 10692900 = 2129^2 + 3270^2 .

It is a cyclic number.

It is not a de Polignac number, because 15225541 - 2³ = 15225533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15225547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9300 + ... + 10813.

It is an arithmetic number, because the mean of its divisors is an integer number (3811603).

Almost surely, 2^15225541 is an apocalyptic number.

It is an amenable number.

15225541 is a deficient number, since it is larger than the sum of its proper divisors (20871).

15225541 is an equidigital number, since it uses as much as digits as its factorization.

15225541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20870.

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

The square root of 15225541 is about 3901.9919272085. The cubic root of 15225541 is about 247.8511344278.

Adding to 15225541 its reverse (14552251), we get a palindrome (29777792).

The spelling of 15225541 in words is "fifteen million, two hundred twenty-five thousand, five hundred forty-one".