22168081 has 8 divisors (see below), whose sum is σ = 24018624. Its totient is φ = 20338320.

The previous prime is 22168073. The next prime is 22168099. The reversal of 22168081 is 18086122.

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 22168081 - 2³ = 22168073 is a prime.

It is a super-2 number, since 2×22168081² = 982847630445122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22168061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2935 + ... + 7276.

It is an arithmetic number, because the mean of its divisors is an integer number (3002328).

Almost surely, 2^22168081 is an apocalyptic number.

It is an amenable number.

22168081 is a deficient number, since it is larger than the sum of its proper divisors (1850543).

22168081 is a wasteful number, since it uses less digits than its factorization.

22168081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10391.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 22168081 is about 4708.2991621179. The cubic root of 22168081 is about 280.9157137143.

The spelling of 22168081 in words is "twenty-two million, one hundred sixty-eight thousand, eighty-one".