22689181 has 4 divisors (see below), whose sum is σ = 22699264. Its totient is φ = 22679100.

The previous prime is 22689167. The next prime is 22689187. The reversal of 22689181 is 18198622.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22689181 - 2⁹ = 22688669 is a prime.

It is a super-2 number, since 2×22689181² = 1029597868901522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22689181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22689187) 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, 46 + ... + 6736.

It is an arithmetic number, because the mean of its divisors is an integer number (5674816).

Almost surely, 2^22689181 is an apocalyptic number.

It is an amenable number.

22689181 is a deficient number, since it is larger than the sum of its proper divisors (10083).

22689181 is an equidigital number, since it uses as much as digits as its factorization.

22689181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10082.

The product of its digits is 13824, while the sum is 37.

The square root of 22689181 is about 4763.3161767827. The cubic root of 22689181 is about 283.0998286825.

It can be divided in two parts, 2268 and 9181, that added together give a square (11449 = 107²).

The spelling of 22689181 in words is "twenty-two million, six hundred eighty-nine thousand, one hundred eighty-one".