22161326 has 16 divisors (see below), whose sum is σ = 36529920. Its totient is φ = 9999480.

The previous prime is 22161313. The next prime is 22161331. The reversal of 22161326 is 62316122.

It is a super-2 number, since 2×22161326² = 982248740156552, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 566 + ... + 6681.

It is an arithmetic number, because the mean of its divisors is an integer number (2283120).

Almost surely, 2^22161326 is an apocalyptic number.

22161326 is a deficient number, since it is larger than the sum of its proper divisors (14368594).

22161326 is a wasteful number, since it uses less digits than its factorization.

22161326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7399.

The product of its digits is 864, while the sum is 23.

The square root of 22161326 is about 4707.5817571233. The cubic root of 22161326 is about 280.8871775136.

Adding to 22161326 its reverse (62316122), we get a palindrome (84477448).

The spelling of 22161326 in words is "twenty-two million, one hundred sixty-one thousand, three hundred twenty-six".