22284481 has 4 divisors (see below), whose sum is σ = 22299732. Its totient is φ = 22269232.

The previous prime is 22284469. The next prime is 22284497. The reversal of 22284481 is 18448222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 194481 + 22090000 = 441^2 + 4700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22284481 is a prime.

It is a super-3 number, since 3×22284481³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22284461) 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, 5170 + ... + 8443.

It is an arithmetic number, because the mean of its divisors is an integer number (5574933).

Almost surely, 2^22284481 is an apocalyptic number.

It is an amenable number.

22284481 is a deficient number, since it is larger than the sum of its proper divisors (15251).

22284481 is a wasteful number, since it uses less digits than its factorization.

22284481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15250.

The product of its digits is 8192, while the sum is 31.

The square root of 22284481 is about 4720.6441297772. The cubic root of 22284481 is about 281.4065323869.

The spelling of 22284481 in words is "twenty-two million, two hundred eighty-four thousand, four hundred eighty-one".