220021343 has 4 divisors (see below), whose sum is σ = 223035408. Its totient is φ = 217007280.

The previous prime is 220021337. The next prime is 220021397. The reversal of 220021343 is 343120022.

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

It is a cyclic number.

It is not a de Polignac number, because 220021343 - 2²⁴ = 203244127 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 (220021313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1506923 + ... + 1507068.

It is an arithmetic number, because the mean of its divisors is an integer number (55758852).

Almost surely, 2^220021343 is an apocalyptic number.

220021343 is a deficient number, since it is larger than the sum of its proper divisors (3014065).

220021343 is an equidigital number, since it uses as much as digits as its factorization.

220021343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3014064.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 220021343 is about 14833.1164291257. The cubic root of 220021343 is about 603.7005948139.

Adding to 220021343 its reverse (343120022), we get a palindrome (563141365).

The spelling of 220021343 in words is "two hundred twenty million, twenty-one thousand, three hundred forty-three".