15336221 has 2 divisors, whose sum is σ = 15336222. Its totient is φ = 15336220.

The previous prime is 15336199. The next prime is 15336259. The reversal of 15336221 is 12263351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15100996 + 235225 = 3886^2 + 485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15336221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15336271) 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 as a sum of consecutive naturals, namely, 7668110 + 7668111.

It is an arithmetic number, because the mean of its divisors is an integer number (7668111).

Almost surely, 2^15336221 is an apocalyptic number.

It is an amenable number.

15336221 is a deficient number, since it is larger than the sum of its proper divisors (1).

15336221 is an equidigital number, since it uses as much as digits as its factorization.

15336221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 23.

The square root of 15336221 is about 3916.1487458982. The cubic root of 15336221 is about 248.4502583878.

Adding to 15336221 its reverse (12263351), we get a palindrome (27599572).

The spelling of 15336221 in words is "fifteen million, three hundred thirty-six thousand, two hundred twenty-one".