22012205 has 4 divisors (see below), whose sum is σ = 26414652. Its totient is φ = 17609760.

The previous prime is 22012187. The next prime is 22012231. The reversal of 22012205 is 50221022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50221022 = 2 ⋅25110511.

It can be written as a sum of positive squares in 2 ways, for example, as 7557001 + 14455204 = 2749^2 + 3802^2 .

It is not a de Polignac number, because 22012205 - 2⁶ = 22012141 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 22012205.

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, 2201216 + ... + 2201225.

It is an arithmetic number, because the mean of its divisors is an integer number (6603663).

Almost surely, 2^22012205 is an apocalyptic number.

It is an amenable number.

22012205 is a deficient number, since it is larger than the sum of its proper divisors (4402447).

22012205 is an equidigital number, since it uses as much as digits as its factorization.

22012205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4402446.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 22012205 is about 4691.7166367972. The cubic root of 22012205 is about 280.2557399864.

Adding to 22012205 its reverse (50221022), we get a palindrome (72233227).

The spelling of 22012205 in words is "twenty-two million, twelve thousand, two hundred five".