22064881 has 4 divisors (see below), whose sum is σ = 22292452. Its totient is φ = 21837312.

The previous prime is 22064873. The next prime is 22064897. The reversal of 22064881 is 18846022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7203856 + 14861025 = 2684^2 + 3855^2 .

It is a cyclic number.

It is not a de Polignac number, because 22064881 - 2³ = 22064873 is a prime.

It is a super-2 number, since 2×22064881² = 973717947088322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22064851) 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 3 ways as a sum of consecutive naturals, for example, 113640 + ... + 113833.

It is an arithmetic number, because the mean of its divisors is an integer number (5573113).

Almost surely, 2^22064881 is an apocalyptic number.

It is an amenable number.

22064881 is a deficient number, since it is larger than the sum of its proper divisors (227571).

22064881 is an equidigital number, since it uses as much as digits as its factorization.

22064881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227570.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 22064881 is about 4697.3270058620. The cubic root of 22064881 is about 280.4791159280.

The spelling of 22064881 in words is "twenty-two million, sixty-four thousand, eight hundred eighty-one".