15342560221 has 2 divisors, whose sum is σ = 15342560222. Its totient is φ = 15342560220.

The previous prime is 15342560179. The next prime is 15342560239. The reversal of 15342560221 is 12206524351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15009680196 + 332880025 = 122514^2 + 18245^2 .

It is a cyclic number.

It is not a de Polignac number, because 15342560221 - 2⁹ = 15342559709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15342560521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7671280110 + 7671280111.

It is an arithmetic number, because the mean of its divisors is an integer number (7671280111).

Almost surely, 2^15342560221 is an apocalyptic number.

It is an amenable number.

15342560221 is a deficient number, since it is larger than the sum of its proper divisors (1).

15342560221 is an equidigital number, since it uses as much as digits as its factorization.

15342560221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 15342560221 in words is "fifteen billion, three hundred forty-two million, five hundred sixty thousand, two hundred twenty-one".