22008081 has 32 divisors (see below), whose sum is σ = 32503680. Its totient is φ = 13188096.

The previous prime is 22008067. The next prime is 22008089. The reversal of 22008081 is 18080022.

It is not a de Polignac number, because 22008081 - 2¹³ = 21999889 is a prime.

It is a super-2 number, since 2×22008081² = 968711258605122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22008089) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201855 + ... + 201963.

It is an arithmetic number, because the mean of its divisors is an integer number (1015740).

Almost surely, 2^22008081 is an apocalyptic number.

It is an amenable number.

22008081 is a deficient number, since it is larger than the sum of its proper divisors (10495599).

22008081 is a wasteful number, since it uses less digits than its factorization.

22008081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 22008081 is about 4691.2771182270. The cubic root of 22008081 is about 280.2382368655.

The spelling of 22008081 in words is "twenty-two million, eight thousand, eighty-one".