220021232 has 20 divisors (see below), whose sum is σ = 434336040. Its totient is φ = 107934528.

The previous prime is 220021183. The next prime is 220021253. The reversal of 220021232 is 232120022.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 128882 + ... + 130577.

It is an arithmetic number, because the mean of its divisors is an integer number (21716802).

Almost surely, 2^220021232 is an apocalyptic number.

It is an amenable number.

220021232 is a deficient number, since it is larger than the sum of its proper divisors (214314808).

220021232 is a wasteful number, since it uses less digits than its factorization.

220021232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259520 (or 259514 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 220021232 is about 14833.1126874975. The cubic root of 220021232 is about 603.7004932923.

Adding to 220021232 its reverse (232120022), we get a palindrome (452141254).

It can be divided in two parts, 2200 and 21232, that added together give a palindrome (23432).

The spelling of 220021232 in words is "two hundred twenty million, twenty-one thousand, two hundred thirty-two".