221888082 has 32 divisors (see below), whose sum is σ = 482856192. Its totient is φ = 67567104.

The previous prime is 221888071. The next prime is 221888087. The reversal of 221888082 is 280888122.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 221888082.

It is not an unprimeable number, because it can be changed into a prime (221888087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7098 + ... + 22229.

It is an arithmetic number, because the mean of its divisors is an integer number (15089256).

Almost surely, 2^221888082 is an apocalyptic number.

221888082 is an abundant number, since it is smaller than the sum of its proper divisors (260968110).

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

221888082 is a wasteful number, since it uses less digits than its factorization.

221888082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29442.

The product of its (nonzero) digits is 32768, while the sum is 39.

The square root of 221888082 is about 14895.9082301147. The cubic root of 221888082 is about 605.4031254501.

The spelling of 221888082 in words is "two hundred twenty-one million, eight hundred eighty-eight thousand, eighty-two".