220813243 has 4 divisors (see below), whose sum is σ = 252358000. Its totient is φ = 189268488.

The previous prime is 220813199. The next prime is 220813253. The reversal of 220813243 is 342318022.

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 220813243 - 2²⁵ = 187258811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220813253) by changing a digit.

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, 15772368 + ... + 15772381.

It is an arithmetic number, because the mean of its divisors is an integer number (63089500).

Almost surely, 2^220813243 is an apocalyptic number.

220813243 is a deficient number, since it is larger than the sum of its proper divisors (31544757).

220813243 is an equidigital number, since it uses as much as digits as its factorization.

220813243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31544756.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 220813243 is about 14859.7861020945. The cubic root of 220813243 is about 604.4240065855.

It can be divided in two parts, 2208 and 13243, that added together give a palindrome (15451).

The spelling of 220813243 in words is "two hundred twenty million, eight hundred thirteen thousand, two hundred forty-three".