123312223 has 16 divisors (see below), whose sum is σ = 136281600. Its totient is φ = 111054240.

The previous prime is 123312199. The next prime is 123312253. The reversal of 123312223 is 322213321.

It is not a de Polignac number, because 123312223 - 2⁵ = 123312191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 123312223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123312253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78318 + ... + 79876.

It is an arithmetic number, because the mean of its divisors is an integer number (8517600).

Almost surely, 2^123312223 is an apocalyptic number.

123312223 is a deficient number, since it is larger than the sum of its proper divisors (12969377).

123312223 is a wasteful number, since it uses less digits than its factorization.

123312223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782.

The product of its digits is 432, while the sum is 19.

The square root of 123312223 is about 11104.6036849588. The cubic root of 123312223 is about 497.7394256768.

Adding to 123312223 its reverse (322213321), we get a palindrome (445525544).

It can be divided in two parts, 1233 and 12223, that added together give a square (13456 = 116²).

The spelling of 123312223 in words is "one hundred twenty-three million, three hundred twelve thousand, two hundred twenty-three".