220243123 has 4 divisors (see below), whose sum is σ = 223853728. Its totient is φ = 216632520.

The previous prime is 220243099. The next prime is 220243159. The reversal of 220243123 is 321342022.

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 220243123 - 2⁵ = 220243091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220243123.

It is not an unprimeable number, because it can be changed into a prime (220243183) 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, 1805211 + ... + 1805332.

It is an arithmetic number, because the mean of its divisors is an integer number (55963432).

Almost surely, 2^220243123 is an apocalyptic number.

220243123 is a deficient number, since it is larger than the sum of its proper divisors (3610605).

220243123 is an equidigital number, since it uses as much as digits as its factorization.

220243123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610604.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 220243123 is about 14840.5903858303. The cubic root of 220243123 is about 603.9033687130.

Adding to 220243123 its reverse (321342022), we get a palindrome (541585145).

The spelling of 220243123 in words is "two hundred twenty million, two hundred forty-three thousand, one hundred twenty-three".