2222881918 has 4 divisors (see below), whose sum is σ = 3334322880. Its totient is φ = 1111440958.

The previous prime is 2222881909. The next prime is 2222881919. The reversal of 2222881918 is 8191882222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222881919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555720478 + ... + 555720481.

It is an arithmetic number, because the mean of its divisors is an integer number (833580720).

Almost surely, 2^2222881918 is an apocalyptic number.

2222881918 is a deficient number, since it is larger than the sum of its proper divisors (1111440962).

2222881918 is a wasteful number, since it uses less digits than its factorization.

2222881918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111440961.

The product of its digits is 73728, while the sum is 43.

The square root of 2222881918 is about 47147.4486902526. The cubic root of 2222881918 is about 1305.0849986963.

The spelling of 2222881918 in words is "two billion, two hundred twenty-two million, eight hundred eighty-one thousand, nine hundred eighteen".