33216194821 has 16 divisors (see below), whose sum is σ = 36667059264. Its totient is φ = 29959098624.

The previous prime is 33216194777. The next prime is 33216194831. The reversal of 33216194821 is 12849161233.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 33216194821 - 2³¹ = 31068711173 is a prime.

It is a super-2 number, since 2×33216194821² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33216194831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389931 + ... + 467416.

It is an arithmetic number, because the mean of its divisors is an integer number (2291691204).

Almost surely, 2^33216194821 is an apocalyptic number.

It is an amenable number.

33216194821 is a deficient number, since it is larger than the sum of its proper divisors (3450864443).

33216194821 is a wasteful number, since it uses less digits than its factorization.

33216194821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857460.

The product of its digits is 62208, while the sum is 40.

The spelling of 33216194821 in words is "thirty-three billion, two hundred sixteen million, one hundred ninety-four thousand, eight hundred twenty-one".