22206081 has 8 divisors (see below), whose sum is σ = 29644384. Its totient is φ = 14785920.

The previous prime is 22206061. The next prime is 22206101. The reversal of 22206081 is 18060222.

It is an interprime number because it is at equal distance from previous prime (22206061) and next prime (22206101).

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

It is not a de Polignac number, because 22206081 - 2⁵ = 22206049 is a prime.

It is a super-2 number, since 2×22206081² = 986220066757122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22206061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1360 + ... + 6801.

It is an arithmetic number, because the mean of its divisors is an integer number (3705548).

Almost surely, 2^22206081 is an apocalyptic number.

22206081 is the 2721-st octagonal number.

It is an amenable number.

22206081 is a deficient number, since it is larger than the sum of its proper divisors (7438303).

22206081 is an equidigital number, since it uses as much as digits as its factorization.

22206081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9071.

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

The square root of 22206081 is about 4712.3328617575. The cubic root of 22206081 is about 281.0761351092.

The spelling of 22206081 in words is "twenty-two million, two hundred six thousand, eighty-one".