22081881 has 8 divisors (see below), whose sum is σ = 29472480. Its totient is φ = 14706272.

The previous prime is 22081877. The next prime is 22081897. The reversal of 22081881 is 18818022.

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 22081881 - 2² = 22081877 is a prime.

It is a super-2 number, since 2×22081881² = 975218936996322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22081811) 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, 325 + ... + 6653.

It is an arithmetic number, because the mean of its divisors is an integer number (3684060).

Almost surely, 2^22081881 is an apocalyptic number.

It is an amenable number.

22081881 is a deficient number, since it is larger than the sum of its proper divisors (7390599).

22081881 is a wasteful number, since it uses less digits than its factorization.

22081881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7495.

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 22081881 is about 4699.1361972175. The cubic root of 22081881 is about 280.5511296248.

The spelling of 22081881 in words is "twenty-two million, eighty-one thousand, eight hundred eighty-one".