1218719223 has 16 divisors (see below), whose sum is σ = 1900537600. Its totient is φ = 769717080.

The previous prime is 1218719191. The next prime is 1218719231. The reversal of 1218719223 is 3229178121.

1218719223 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1218719223 - 2⁵ = 1218719191 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 (1218719233) 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, 1187323 + ... + 1188348.

It is an arithmetic number, because the mean of its divisors is an integer number (118783600).

Almost surely, 2^1218719223 is an apocalyptic number.

1218719223 is a deficient number, since it is larger than the sum of its proper divisors (681818377).

1218719223 is a wasteful number, since it uses less digits than its factorization.

1218719223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2375699 (or 2375693 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 1218719223 is about 34910.1593092899. The cubic root of 1218719223 is about 1068.1556789220.

The spelling of 1218719223 in words is "one billion, two hundred eighteen million, seven hundred nineteen thousand, two hundred twenty-three".