220021822 has 4 divisors (see below), whose sum is σ = 330032736. Its totient is φ = 110010910.

The previous prime is 220021819. The next prime is 220021847. The reversal of 220021822 is 228120022.

220021822 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 220021822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55005454 + ... + 55005457.

It is an arithmetic number, because the mean of its divisors is an integer number (82508184).

Almost surely, 2^220021822 is an apocalyptic number.

220021822 is a deficient number, since it is larger than the sum of its proper divisors (110010914).

220021822 is a wasteful number, since it uses less digits than its factorization.

220021822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110010913.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 220021822 is about 14833.1325754205. The cubic root of 220021822 is about 603.7010329114.

Adding to 220021822 its reverse (228120022), we get a palindrome (448141844).

The spelling of 220021822 in words is "two hundred twenty million, twenty-one thousand, eight hundred twenty-two".