22011859 has 4 divisors (see below), whose sum is σ = 22022104. Its totient is φ = 22001616.

The previous prime is 22011853. The next prime is 22011863. The reversal of 22011859 is 95811022.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 95811022 = 2 ⋅47905511.

It is a cyclic number.

It is not a de Polignac number, because 22011859 - 2⁹ = 22011347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22011853) 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, 522 + ... + 6655.

It is an arithmetic number, because the mean of its divisors is an integer number (5505526).

Almost surely, 2^22011859 is an apocalyptic number.

22011859 is a deficient number, since it is larger than the sum of its proper divisors (10245).

22011859 is an equidigital number, since it uses as much as digits as its factorization.

22011859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10244.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 22011859 is about 4691.6797631552. The cubic root of 22011859 is about 280.2542715739.

The spelling of 22011859 in words is "twenty-two million, eleven thousand, eight hundred fifty-nine".