15340335221 has 2 divisors, whose sum is σ = 15340335222. Its totient is φ = 15340335220.

The previous prime is 15340335187. The next prime is 15340335239. The reversal of 15340335221 is 12253304351.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14796046321 + 544288900 = 121639^2 + 23330^2 .

It is a cyclic number.

It is not a de Polignac number, because 15340335221 - 2²⁶ = 15273226357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15340335281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7670167610 + 7670167611.

It is an arithmetic number, because the mean of its divisors is an integer number (7670167611).

Almost surely, 2^15340335221 is an apocalyptic number.

It is an amenable number.

15340335221 is a deficient number, since it is larger than the sum of its proper divisors (1).

15340335221 is an equidigital number, since it uses as much as digits as its factorization.

15340335221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 15340335221 its reverse (12253304351), we get a palindrome (27593639572).

The spelling of 15340335221 in words is "fifteen billion, three hundred forty million, three hundred thirty-five thousand, two hundred twenty-one".