22183281 has 8 divisors (see below), whose sum is σ = 32864160. Its totient is φ = 14788836.

The previous prime is 22183277. The next prime is 22183297. The reversal of 22183281 is 18238122.

It is not a de Polignac number, because 22183281 - 2² = 22183277 is a prime.

It is a super-2 number, since 2×22183281² = 984195911849922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 821603 = 22183281 / (2 + 2 + 1 + 8 + 3 + 2 + 8 + 1).

It is not an unprimeable number, because it can be changed into a prime (22183481) 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, 410775 + ... + 410828.

It is an arithmetic number, because the mean of its divisors is an integer number (4108020).

Almost surely, 2^22183281 is an apocalyptic number.

It is an amenable number.

22183281 is a deficient number, since it is larger than the sum of its proper divisors (10680879).

22183281 is an equidigital number, since it uses as much as digits as its factorization.

22183281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821612 (or 821606 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 22183281 is about 4709.9130565224. The cubic root of 22183281 is about 280.9799042547.

The spelling of 22183281 in words is "twenty-two million, one hundred eighty-three thousand, two hundred eighty-one".