22056861 has 4 divisors (see below), whose sum is σ = 29409152. Its totient is φ = 14704572.

The previous prime is 22056823. The next prime is 22056883. The reversal of 22056861 is 16865022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 22056861 - 2¹⁰ = 22055837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22056821) 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, 3676141 + ... + 3676146.

It is an arithmetic number, because the mean of its divisors is an integer number (7352288).

Almost surely, 2^22056861 is an apocalyptic number.

It is an amenable number.

22056861 is a deficient number, since it is larger than the sum of its proper divisors (7352291).

22056861 is an equidigital number, since it uses as much as digits as its factorization.

22056861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7352290.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 22056861 is about 4696.4732512812. The cubic root of 22056861 is about 280.4451295660.

The spelling of 22056861 in words is "twenty-two million, fifty-six thousand, eight hundred sixty-one".