221966082 has 40 divisors (see below), whose sum is σ = 535632636. Its totient is φ = 68296608.

The previous prime is 221966081. The next prime is 221966111. The reversal of 221966082 is 280669122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 197374401 + 24591681 = 14049^2 + 4959^2 .

It is not an unprimeable number, because it can be changed into a prime (221966081) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 50593 + ... + 54804.

Almost surely, 2^221966082 is an apocalyptic number.

221966082 is an abundant number, since it is smaller than the sum of its proper divisors (313666554).

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

221966082 is a wasteful number, since it uses less digits than its factorization.

221966082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105424 (or 105415 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 221966082 is about 14898.5261687188. The cubic root of 221966082 is about 605.4740559709.

The spelling of 221966082 in words is "two hundred twenty-one million, nine hundred sixty-six thousand, eighty-two".