22222224444445 has 8 divisors (see below), whose sum is σ = 26666695646136. Its totient is φ = 17777762013696.

The previous prime is 22222224444443. The next prime is 22222224444461. The reversal of 22222224444445 is 54444442222222.

Adding to 22222224444445 its reverse (54444442222222), we get a palindrome (76666666666667).

22222224444445 = 3333333² + 3333334².

It can be written as a sum of positive squares in 4 ways, for example, as 10765610647801 + 11456613796644 = 3281099^2 + 3384762^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22222224444445 - 2¹ = 22222224444443 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222224444443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6550689 + ... + 9346441.

It is an arithmetic number, because the mean of its divisors is an integer number (3333336955767).

Almost surely, 2^{22222224444445} is an apocalyptic number.

22222224444445 is the 3333334-th centered square number.

It is an amenable number.

22222224444445 is a deficient number, since it is larger than the sum of its proper divisors (4444471201691).

22222224444445 is a wasteful number, since it uses less digits than its factorization.

22222224444445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4385471.

The product of its digits is 2621440, while the sum is 43.

The spelling of 22222224444445 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred twenty-four million, four hundred forty-four thousand, four hundred forty-five".