36566224221 has 4 divisors (see below), whose sum is σ = 48754965632. Its totient is φ = 24377482812.

The previous prime is 36566224217. The next prime is 36566224229. The reversal of 36566224221 is 12242266563.

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 not a de Polignac number, because 36566224221 - 2² = 36566224217 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 36566224221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36566224229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6094370701 + ... + 6094370706.

It is an arithmetic number, because the mean of its divisors is an integer number (12188741408).

Almost surely, 2^36566224221 is an apocalyptic number.

It is an amenable number.

36566224221 is a deficient number, since it is larger than the sum of its proper divisors (12188741411).

36566224221 is a wasteful number, since it uses less digits than its factorization.

36566224221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12188741410.

The product of its digits is 207360, while the sum is 39.

The spelling of 36566224221 in words is "thirty-six billion, five hundred sixty-six million, two hundred twenty-four thousand, two hundred twenty-one".