2222216686 has 4 divisors (see below), whose sum is σ = 3333325032. Its totient is φ = 1111108342.

The previous prime is 2222216677. The next prime is 2222216723. The reversal of 2222216686 is 6866122222.

It is a happy number.

2222216686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6866122222 = 2 ⋅3433061111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555554170 + ... + 555554173.

It is an arithmetic number, because the mean of its divisors is an integer number (833331258).

Almost surely, 2^2222216686 is an apocalyptic number.

2222216686 is a deficient number, since it is larger than the sum of its proper divisors (1111108346).

2222216686 is a wasteful number, since it uses less digits than its factorization.

2222216686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111108345.

The product of its digits is 55296, while the sum is 37.

The square root of 2222216686 is about 47140.3933585625. The cubic root of 2222216686 is about 1304.9547967099.

The spelling of 2222216686 in words is "two billion, two hundred twenty-two million, two hundred sixteen thousand, six hundred eighty-six".