15005340221 has 2 divisors, whose sum is σ = 15005340222. Its totient is φ = 15005340220.

The previous prime is 15005340151. The next prime is 15005340227. The reversal of 15005340221 is 12204350051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9527712100 + 5477628121 = 97610^2 + 74011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15005340221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15005340227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7502670110 + 7502670111.

It is an arithmetic number, because the mean of its divisors is an integer number (7502670111).

Almost surely, 2^15005340221 is an apocalyptic number.

It is an amenable number.

15005340221 is a deficient number, since it is larger than the sum of its proper divisors (1).

15005340221 is an equidigital number, since it uses as much as digits as its factorization.

15005340221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 15005340221 its reverse (12204350051), we get a palindrome (27209690272).

The spelling of 15005340221 in words is "fifteen billion, five million, three hundred forty thousand, two hundred twenty-one".