220320243 has 80 divisors (see below), whose sum is σ = 403958016. Its totient is φ = 117754560.

The previous prime is 220320239. The next prime is 220320251. The reversal of 220320243 is 342023022.

It is not a de Polignac number, because 220320243 - 2² = 220320239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220320203) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 265996 + ... + 266822.

Almost surely, 2^220320243 is an apocalyptic number.

220320243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

220320243 is a deficient number, since it is larger than the sum of its proper divisors (183637773).

220320243 is a wasteful number, since it uses less digits than its factorization.

220320243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886 (or 877 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 220320243 is about 14843.1884377987. The cubic root of 220320243 is about 603.9738477851.

Adding to 220320243 its reverse (342023022), we get a palindrome (562343265).

The spelling of 220320243 in words is "two hundred twenty million, three hundred twenty thousand, two hundred forty-three".