220243663 has 4 divisors (see below), whose sum is σ = 220291240. Its totient is φ = 220196088.

The previous prime is 220243643. The next prime is 220243679. The reversal of 220243663 is 366342022.

220243663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 220243663 - 2¹³ = 220235471 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 (220243613) 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, 15993 + ... + 26386.

It is an arithmetic number, because the mean of its divisors is an integer number (55072810).

Almost surely, 2^220243663 is an apocalyptic number.

220243663 is a deficient number, since it is larger than the sum of its proper divisors (47577).

220243663 is an equidigital number, since it uses as much as digits as its factorization.

220243663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47576.

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 220243663 is about 14840.6085791655. The cubic root of 220243663 is about 603.9038622699.

Adding to 220243663 its reverse (366342022), we get a palindrome (586585685).

The spelling of 220243663 in words is "two hundred twenty million, two hundred forty-three thousand, six hundred sixty-three".