22221667 has 4 divisors (see below), whose sum is σ = 23931040. Its totient is φ = 20512296.

The previous prime is 22221649. The next prime is 22221691. The reversal of 22221667 is 76612222.

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

It is a cyclic number.

It is not a de Polignac number, because 22221667 - 2⁷ = 22221539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22221767) 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, 854667 + ... + 854692.

It is an arithmetic number, because the mean of its divisors is an integer number (5982760).

Almost surely, 2^22221667 is an apocalyptic number.

22221667 is a deficient number, since it is larger than the sum of its proper divisors (1709373).

22221667 is a wasteful number, since it uses less digits than its factorization.

22221667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709372.

The product of its digits is 4032, while the sum is 28.

The square root of 22221667 is about 4713.9863173327. The cubic root of 22221667 is about 281.1418802850.

Adding to 22221667 its reverse (76612222), we get a palindrome (98833889).

The spelling of 22221667 in words is "twenty-two million, two hundred twenty-one thousand, six hundred sixty-seven".