14539527721 has 2 divisors, whose sum is σ = 14539527722. Its totient is φ = 14539527720.

The previous prime is 14539527703. The next prime is 14539527781. The reversal of 14539527721 is 12772593541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13193738496 + 1345789225 = 114864^2 + 36685^2 .

It is an emirp because it is prime and its reverse (12772593541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14539527721 - 2⁹ = 14539527209 is a prime.

It is a super-2 number, since 2×14539527721² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (14539527701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7269763860 + 7269763861.

It is an arithmetic number, because the mean of its divisors is an integer number (7269763861).

Almost surely, 2^14539527721 is an apocalyptic number.

It is an amenable number.

14539527721 is a deficient number, since it is larger than the sum of its proper divisors (1).

14539527721 is an equidigital number, since it uses as much as digits as its factorization.

14539527721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529200, while the sum is 46.

The spelling of 14539527721 in words is "fourteen billion, five hundred thirty-nine million, five hundred twenty-seven thousand, seven hundred twenty-one".