220433421 has 16 divisors (see below), whose sum is σ = 333179840. Its totient is φ = 128511360.

The previous prime is 220433401. The next prime is 220433429. The reversal of 220433421 is 124334022.

It is not a de Polignac number, because 220433421 - 2⁷ = 220433293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220433429) 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, 148000 + ... + 149481.

It is an arithmetic number, because the mean of its divisors is an integer number (20823740).

Almost surely, 2^220433421 is an apocalyptic number.

It is an amenable number.

220433421 is a deficient number, since it is larger than the sum of its proper divisors (112746419).

220433421 is a wasteful number, since it uses less digits than its factorization.

220433421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297516.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 220433421 is about 14847.0004041220. Note that the first 3 decimals coincide. The cubic root of 220433421 is about 604.0772500715.

Adding to 220433421 its reverse (124334022), we get a palindrome (344767443).

The spelling of 220433421 in words is "two hundred twenty million, four hundred thirty-three thousand, four hundred twenty-one".