216105420535 has 4 divisors (see below), whose sum is σ = 259326504648. Its totient is φ = 172884336424.

The previous prime is 216105420497. The next prime is 216105420539. The reversal of 216105420535 is 535024501612.

216105420535 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216105420535 - 2¹⁹ = 216104896247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216105420535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216105420539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21610542049 + ... + 21610542058.

It is an arithmetic number, because the mean of its divisors is an integer number (64831626162).

Almost surely, 2^216105420535 is an apocalyptic number.

216105420535 is a deficient number, since it is larger than the sum of its proper divisors (43221084113).

216105420535 is an equidigital number, since it uses as much as digits as its factorization.

216105420535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43221084112.

The product of its (nonzero) digits is 36000, while the sum is 34.

The spelling of 216105420535 in words is "two hundred sixteen billion, one hundred five million, four hundred twenty thousand, five hundred thirty-five".