22220005 has 4 divisors (see below), whose sum is σ = 26664012. Its totient is φ = 17776000.

The previous prime is 22219999. The next prime is 22220027. The reversal of 22220005 is 50002222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50002222 = 2 ⋅25001111.

It can be written as a sum of positive squares in 2 ways, for example, as 13734436 + 8485569 = 3706^2 + 2913^2 .

It is not a de Polignac number, because 22220005 - 2⁵ = 22219973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2221996 + ... + 2222005.

It is an arithmetic number, because the mean of its divisors is an integer number (6666003).

Almost surely, 2^22220005 is an apocalyptic number.

It is an amenable number.

22220005 is a deficient number, since it is larger than the sum of its proper divisors (4444007).

22220005 is an equidigital number, since it uses as much as digits as its factorization.

22220005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4444006.

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 22220005 is about 4713.8100301136. The cubic root of 22220005 is about 281.1348710680.

Adding to 22220005 its reverse (50002222), we get a palindrome (72222227).

The spelling of 22220005 in words is "twenty-two million, two hundred twenty thousand, five".