1118388223 has 4 divisors (see below), whose sum is σ = 1120835920. Its totient is φ = 1115940528.

The previous prime is 1118388221. The next prime is 1118388253. The reversal of 1118388223 is 3228838111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3228838111 = 829 ⋅3894859.

It is a cyclic number.

It is not a de Polignac number, because 1118388223 - 2¹ = 1118388221 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 (1118388221) 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, 1223163 + ... + 1224076.

It is an arithmetic number, because the mean of its divisors is an integer number (280208980).

Almost surely, 2^1118388223 is an apocalyptic number.

1118388223 is a deficient number, since it is larger than the sum of its proper divisors (2447697).

1118388223 is an equidigital number, since it uses as much as digits as its factorization.

1118388223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2447696.

The product of its digits is 18432, while the sum is 37.

The square root of 1118388223 is about 33442.3118668551. The cubic root of 1118388223 is about 1038.0004179643. Note that the first 3 decimals are identical.

The spelling of 1118388223 in words is "one billion, one hundred eighteen million, three hundred eighty-eight thousand, two hundred twenty-three".