221008966836 has 48 divisors (see below), whose sum is σ = 589425164160. Its totient is φ = 63138142080.

The previous prime is 221008966831. The next prime is 221008966847. The reversal of 221008966836 is 638669800122.

221008966836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221008966836² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221008966831) 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 15 ways as a sum of consecutive naturals, for example, 603910 + ... + 898178.

It is an arithmetic number, because the mean of its divisors is an integer number (12279690920).

Almost surely, 2^221008966836 is an apocalyptic number.

It is an amenable number.

221008966836 is an abundant number, since it is smaller than the sum of its proper divisors (368416197324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221008966836 is a wasteful number, since it uses less digits than its factorization.

221008966836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303224 (or 303222 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 51.

The spelling of 221008966836 in words is "two hundred twenty-one billion, eight million, nine hundred sixty-six thousand, eight hundred thirty-six".