16214709521 has 2 divisors, whose sum is σ = 16214709522. Its totient is φ = 16214709520.

The previous prime is 16214709503. The next prime is 16214709569. The reversal of 16214709521 is 12590741261.

16214709521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15665275921 + 549433600 = 125161^2 + 23440^2 .

It is a cyclic number.

It is not a de Polignac number, because 16214709521 - 2⁶ = 16214709457 is a prime.

It is not a weakly prime, because it can be changed into another prime (16214709221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8107354760 + 8107354761.

It is an arithmetic number, because the mean of its divisors is an integer number (8107354761).

Almost surely, 2^16214709521 is an apocalyptic number.

It is an amenable number.

16214709521 is a deficient number, since it is larger than the sum of its proper divisors (1).

16214709521 is an equidigital number, since it uses as much as digits as its factorization.

16214709521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 16214709521 in words is "sixteen billion, two hundred fourteen million, seven hundred nine thousand, five hundred twenty-one".