22006145 has 12 divisors (see below), whose sum is σ = 30719124. Its totient is φ = 15089760.

The previous prime is 22006133. The next prime is 22006163. The reversal of 22006145 is 54160022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3952144 + 18054001 = 1988^2 + 4249^2 .

It is not a de Polignac number, because 22006145 - 2¹⁴ = 21989761 is a prime.

It is a super-2 number, since 2×22006145² = 968540835522050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44666 + ... + 45155.

It is an arithmetic number, because the mean of its divisors is an integer number (2559927).

Almost surely, 2^22006145 is an apocalyptic number.

It is an amenable number.

22006145 is a deficient number, since it is larger than the sum of its proper divisors (8712979).

22006145 is an equidigital number, since it uses as much as digits as its factorization.

22006145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89840 (or 89833 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 22006145 is about 4691.0707732883. The cubic root of 22006145 is about 280.2300193213.

Adding to 22006145 its reverse (54160022), we get a palindrome (76166167).

The spelling of 22006145 in words is "twenty-two million, six thousand, one hundred forty-five".