221196836 has 12 divisors (see below), whose sum is σ = 442393728. Its totient is φ = 94798632.

The previous prime is 221196821. The next prime is 221196847. The reversal of 221196836 is 638691122.

It is a happy number.

221196836 is an admirable number.

It is a super-3 number, since 3×221196836³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221196836.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3949916 + ... + 3949971.

It is an arithmetic number, because the mean of its divisors is an integer number (36866144).

Almost surely, 2^221196836 is an apocalyptic number.

It is an amenable number.

221196836 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221196836 is a wasteful number, since it uses less digits than its factorization.

221196836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7899898 (or 7899896 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 221196836 is about 14872.6875849659. The cubic root of 221196836 is about 604.7738024693.

The spelling of 221196836 in words is "two hundred twenty-one million, one hundred ninety-six thousand, eight hundred thirty-six".