22006655 has 16 divisors (see below), whose sum is σ = 30326400. Its totient is φ = 15161760.

The previous prime is 22006639. The next prime is 22006657. The reversal of 22006655 is 55660022.

It is a happy number.

It is not a de Polignac number, because 22006655 - 2⁴ = 22006639 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22006657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9485 + ... + 11574.

It is an arithmetic number, because the mean of its divisors is an integer number (1895400).

Almost surely, 2^22006655 is an apocalyptic number.

22006655 is a deficient number, since it is larger than the sum of its proper divisors (8319745).

22006655 is a wasteful number, since it uses less digits than its factorization.

22006655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21094.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 22006655 is about 4691.1251315649. The cubic root of 22006655 is about 280.2321841137.

Adding to 22006655 its reverse (55660022), we get a palindrome (77666677).

The spelling of 22006655 in words is "twenty-two million, six thousand, six hundred fifty-five".