22056689 has 4 divisors (see below), whose sum is σ = 22113780. Its totient is φ = 21999600.

The previous prime is 22056673. The next prime is 22056743. The reversal of 22056689 is 98665022.

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 9560464 + 12496225 = 3092^2 + 3535^2 .

It is a cyclic number.

It is not a de Polignac number, because 22056689 - 2⁴ = 22056673 is a prime.

It is a super-3 number, since 3×22056689³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22056649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27962 + ... + 28739.

It is an arithmetic number, because the mean of its divisors is an integer number (5528445).

Almost surely, 2^22056689 is an apocalyptic number.

It is an amenable number.

22056689 is a deficient number, since it is larger than the sum of its proper divisors (57091).

22056689 is an equidigital number, since it uses as much as digits as its factorization.

22056689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57090.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 22056689 is about 4696.4549396327. The cubic root of 22056689 is about 280.4444005912. Note that the first 4 decimals are identical.

The spelling of 22056689 in words is "twenty-two million, fifty-six thousand, six hundred eighty-nine".