216221416633 has 4 divisors (see below), whose sum is σ = 216484140928. Its totient is φ = 215958692340.

The previous prime is 216221416597. The next prime is 216221416667. The reversal of 216221416633 is 336614122612.

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 216221416633 - 2¹³ = 216221408441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216221416592 and 216221416601.

It is not an unprimeable number, because it can be changed into a prime (216221416693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131360913 + ... + 131362558.

It is an arithmetic number, because the mean of its divisors is an integer number (54121035232).

Almost surely, 2^216221416633 is an apocalyptic number.

It is an amenable number.

216221416633 is a deficient number, since it is larger than the sum of its proper divisors (262724295).

216221416633 is an equidigital number, since it uses as much as digits as its factorization.

216221416633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262724294.

The product of its digits is 62208, while the sum is 37.

The spelling of 216221416633 in words is "two hundred sixteen billion, two hundred twenty-one million, four hundred sixteen thousand, six hundred thirty-three".