22210655 has 4 divisors (see below), whose sum is σ = 26652792. Its totient is φ = 17768520.

The previous prime is 22210651. The next prime is 22210667. The reversal of 22210655 is 55601222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55601222 = 2 ⋅27800611.

It is not a de Polignac number, because 22210655 - 2² = 22210651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22210655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22210651) 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, 2221061 + ... + 2221070.

It is an arithmetic number, because the mean of its divisors is an integer number (6663198).

Almost surely, 2^22210655 is an apocalyptic number.

22210655 is a deficient number, since it is larger than the sum of its proper divisors (4442137).

22210655 is an equidigital number, since it uses as much as digits as its factorization.

22210655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4442136.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 22210655 is about 4712.8181590212. The cubic root of 22210655 is about 281.0954324356.

Adding to 22210655 its reverse (55601222), we get a palindrome (77811877).

The spelling of 22210655 in words is "twenty-two million, two hundred ten thousand, six hundred fifty-five".