22220861 has 8 divisors (see below), whose sum is σ = 25189920. Its totient is φ = 19431792.

The previous prime is 22220851. The next prime is 22220879. The reversal of 22220861 is 16802222.

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

It is a cyclic number.

It is not a de Polignac number, because 22220861 - 2²² = 18026557 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 (22220851) 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, 44735 + ... + 45228.

It is an arithmetic number, because the mean of its divisors is an integer number (3148740).

Almost surely, 2^22220861 is an apocalyptic number.

It is an amenable number.

22220861 is a deficient number, since it is larger than the sum of its proper divisors (2969059).

22220861 is a wasteful number, since it uses less digits than its factorization.

22220861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89995.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 22220861 is about 4713.9008262797. The cubic root of 22220861 is about 281.1384811536.

The spelling of 22220861 in words is "twenty-two million, two hundred twenty thousand, eight hundred sixty-one".