22106881 has 2 divisors, whose sum is σ = 22106882. Its totient is φ = 22106880.

The previous prime is 22106869. The next prime is 22106893. The reversal of 22106881 is 18860122.

It is the 1920-th star number.

It is a balanced prime because it is at equal distance from previous prime (22106869) and next prime (22106893).

It can be written as a sum of positive squares in only one way, i.e., 17505856 + 4601025 = 4184^2 + 2145^2 .

It is a cyclic number.

It is not a de Polignac number, because 22106881 - 2⁷ = 22106753 is a prime.

It is a super-2 number, since 2×22106881² = 977428375096322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22106281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11053440 + 11053441.

It is an arithmetic number, because the mean of its divisors is an integer number (11053441).

Almost surely, 2^22106881 is an apocalyptic number.

It is an amenable number.

22106881 is a deficient number, since it is larger than the sum of its proper divisors (1).

22106881 is an equidigital number, since it uses as much as digits as its factorization.

22106881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 22106881 is about 4701.7955081011. The cubic root of 22106881 is about 280.6569650081.

The spelling of 22106881 in words is "twenty-two million, one hundred six thousand, eight hundred eighty-one".