221795682 has 16 divisors (see below), whose sum is σ = 444216960. Its totient is φ = 73827632.

The previous prime is 221795663. The next prime is 221795687. The reversal of 221795682 is 286597122.

It is not an unprimeable number, because it can be changed into a prime (221795687) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 21393 + ... + 30020.

It is an arithmetic number, because the mean of its divisors is an integer number (27763560).

Almost surely, 2^221795682 is an apocalyptic number.

221795682 is an abundant number, since it is smaller than the sum of its proper divisors (222421278).

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

221795682 is a wasteful number, since it uses less digits than its factorization.

221795682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52137.

The product of its digits is 120960, while the sum is 42.

The square root of 221795682 is about 14892.8063842917. The cubic root of 221795682 is about 605.3190785514.

The spelling of 221795682 in words is "two hundred twenty-one million, seven hundred ninety-five thousand, six hundred eighty-two".