21616543514301 has 4 divisors (see below), whose sum is σ = 28822058019072. Its totient is φ = 14411029009532.

The previous prime is 21616543514257. The next prime is 21616543514311. The reversal of 21616543514301 is 10341534561612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21616543514301 - 2¹⁹ = 21616542990013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21616543514311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3602757252381 + ... + 3602757252386.

It is an arithmetic number, because the mean of its divisors is an integer number (7205514504768).

Almost surely, 2^{21616543514301} is an apocalyptic number.

It is an amenable number.

21616543514301 is a deficient number, since it is larger than the sum of its proper divisors (7205514504771).

21616543514301 is an equidigital number, since it uses as much as digits as its factorization.

21616543514301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7205514504770.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 21616543514301 in words is "twenty-one trillion, six hundred sixteen billion, five hundred forty-three million, five hundred fourteen thousand, three hundred one".