22115686 has 4 divisors (see below), whose sum is σ = 33173532. Its totient is φ = 11057842.

The previous prime is 22115669. The next prime is 22115689. The reversal of 22115686 is 68651122.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22115689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5528920 + ... + 5528923.

It is an arithmetic number, because the mean of its divisors is an integer number (8293383).

Almost surely, 2^22115686 is an apocalyptic number.

22115686 is a deficient number, since it is larger than the sum of its proper divisors (11057846).

22115686 is a wasteful number, since it uses less digits than its factorization.

22115686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11057845.

The product of its digits is 5760, while the sum is 31.

The square root of 22115686 is about 4702.7317593076. The cubic root of 22115686 is about 280.6942212296.

It can be divided in two parts, 22115 and 686, that added together give a square (22801 = 151²).

The spelling of 22115686 in words is "twenty-two million, one hundred fifteen thousand, six hundred eighty-six".