22043381 has 4 divisors (see below), whose sum is σ = 22148064. Its totient is φ = 21938700.

The previous prime is 22043377. The next prime is 22043419. The reversal of 22043381 is 18334022.

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.

It is a cyclic number.

It is not a de Polignac number, because 22043381 - 2² = 22043377 is a prime.

It is a super-3 number, since 3×22043381³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22043341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52025 + ... + 52446.

It is an arithmetic number, because the mean of its divisors is an integer number (5537016).

Almost surely, 2^22043381 is an apocalyptic number.

It is an amenable number.

22043381 is a deficient number, since it is larger than the sum of its proper divisors (104683).

22043381 is a wasteful number, since it uses less digits than its factorization.

22043381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104682.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 22043381 is about 4695.0379125200. The cubic root of 22043381 is about 280.3879867910.

The spelling of 22043381 in words is "twenty-two million, forty-three thousand, three hundred eighty-one".