220821422 has 8 divisors (see below), whose sum is σ = 331300200. Its totient is φ = 110388024.

The previous prime is 220821409. The next prime is 220821473. The reversal of 220821422 is 224128022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6329 + ... + 21947.

It is an arithmetic number, because the mean of its divisors is an integer number (41412525).

Almost surely, 2^220821422 is an apocalyptic number.

220821422 is a deficient number, since it is larger than the sum of its proper divisors (110478778).

220821422 is a wasteful number, since it uses less digits than its factorization.

220821422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22690.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 220821422 is about 14860.0613053917. The cubic root of 220821422 is about 604.4314691858.

Adding to 220821422 its reverse (224128022), we get a palindrome (444949444).

The spelling of 220821422 in words is "two hundred twenty million, eight hundred twenty-one thousand, four hundred twenty-two".