15221841 has 8 divisors (see below), whose sum is σ = 20326080. Its totient is φ = 10132752.

The previous prime is 15221819. The next prime is 15221861. The reversal of 15221841 is 14812251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15221841 - 2¹⁴ = 15205457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15221861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1186 + ... + 5643.

It is an arithmetic number, because the mean of its divisors is an integer number (2540760).

Almost surely, 2^15221841 is an apocalyptic number.

It is an amenable number.

15221841 is a deficient number, since it is larger than the sum of its proper divisors (5104239).

15221841 is an equidigital number, since it uses as much as digits as its factorization.

15221841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7575.

The product of its digits is 640, while the sum is 24.

The square root of 15221841 is about 3901.5177815819. The cubic root of 15221841 is about 247.8310558092.

The spelling of 15221841 in words is "fifteen million, two hundred twenty-one thousand, eight hundred forty-one".