2223123456 has 88 divisors (see below), whose sum is σ = 6274136880. Its totient is φ = 697434112.

The previous prime is 2223123451. The next prime is 2223123457. The reversal of 2223123456 is 6543213222.

It is not an unprimeable number, because it can be changed into a prime (2223123451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30940 + ... + 73508.

It is an arithmetic number, because the mean of its divisors is an integer number (71297010).

Almost surely, 2^2223123456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2223123456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3137068440).

2223123456 is an abundant number, since it is smaller than the sum of its proper divisors (4051013424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2223123456 is a wasteful number, since it uses less digits than its factorization.

2223123456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42609 (or 42591 counting only the distinct ones).

The product of its digits is 17280, while the sum is 30.

The square root of 2223123456 is about 47150.0101378568. The cubic root of 2223123456 is about 1305.1322670946.

Adding to 2223123456 its reverse (6543213222), we get a palindrome (8766336678).

The spelling of 2223123456 in words is "two billion, two hundred twenty-three million, one hundred twenty-three thousand, four hundred fifty-six".