22182321 has 16 divisors (see below), whose sum is σ = 33868800. Its totient is φ = 12650448.

The previous prime is 22182313. The next prime is 22182337. The reversal of 22182321 is 12328122.

It is a happy number.

It is not a de Polignac number, because 22182321 - 2³ = 22182313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22182301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16990 + ... + 18248.

It is an arithmetic number, because the mean of its divisors is an integer number (2116800).

Almost surely, 2^22182321 is an apocalyptic number.

22182321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22182321 is a deficient number, since it is larger than the sum of its proper divisors (11686479).

22182321 is a wasteful number, since it uses less digits than its factorization.

22182321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108.

The product of its digits is 384, while the sum is 21.

The square root of 22182321 is about 4709.8111427105. The cubic root of 22182321 is about 280.9758509830.

The spelling of 22182321 in words is "twenty-two million, one hundred eighty-two thousand, three hundred twenty-one".