22164861 has 4 divisors (see below), whose sum is σ = 29553152. Its totient is φ = 14776572.

The previous prime is 22164841. The next prime is 22164869. The reversal of 22164861 is 16846122.

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 22164861 - 2⁷ = 22164733 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 (22164869) 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, 3694141 + ... + 3694146.

It is an arithmetic number, because the mean of its divisors is an integer number (7388288).

Almost surely, 2^22164861 is an apocalyptic number.

It is an amenable number.

22164861 is a deficient number, since it is larger than the sum of its proper divisors (7388291).

22164861 is an equidigital number, since it uses as much as digits as its factorization.

22164861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7388290.

The product of its digits is 4608, while the sum is 30.

The square root of 22164861 is about 4707.9572003152. The cubic root of 22164861 is about 280.9021116889.

The spelling of 22164861 in words is "twenty-two million, one hundred sixty-four thousand, eight hundred sixty-one".