1243220223 has 8 divisors (see below), whose sum is σ = 1894430848. Its totient is φ = 710411544.

The previous prime is 1243220213. The next prime is 1243220243. The reversal of 1243220223 is 3220223421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1243220223 - 2⁶ = 1243220159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 59200963 = 1243220223 / (1 + 2 + 4 + 3 + 2 + 2 + 0 + 2 + 2 + 3).

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 1243220223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243220203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29600461 + ... + 29600502.

It is an arithmetic number, because the mean of its divisors is an integer number (236803856).

Almost surely, 2^1243220223 is an apocalyptic number.

1243220223 is a deficient number, since it is larger than the sum of its proper divisors (651210625).

1243220223 is an equidigital number, since it uses as much as digits as its factorization.

1243220223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59200973.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 1243220223 is about 35259.3281700035. The cubic root of 1243220223 is about 1075.2662684211.

Adding to 1243220223 its reverse (3220223421), we get a palindrome (4463443644).

The spelling of 1243220223 in words is "one billion, two hundred forty-three million, two hundred twenty thousand, two hundred twenty-three".