22221433 has 4 divisors (see below), whose sum is σ = 23930788. Its totient is φ = 20512080.

The previous prime is 22221391. The next prime is 22221449. The reversal of 22221433 is 33412222.

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 2534464 + 19686969 = 1592^2 + 4437^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22221433 is a prime.

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 22221433.

It is not an unprimeable number, because it can be changed into a prime (22221233) 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, 854658 + ... + 854683.

It is an arithmetic number, because the mean of its divisors is an integer number (5982697).

Almost surely, 2^22221433 is an apocalyptic number.

It is an amenable number.

22221433 is a deficient number, since it is larger than the sum of its proper divisors (1709355).

22221433 is a wasteful number, since it uses less digits than its factorization.

22221433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709354.

The product of its digits is 576, while the sum is 19.

The square root of 22221433 is about 4713.9614975093. The cubic root of 22221433 is about 281.1408934488.

Adding to 22221433 its reverse (33412222), we get a palindrome (55633655).

It can be divided in two parts, 2222 and 1433, that added together give a triangular number (3655 = T₈₅).

The spelling of 22221433 in words is "twenty-two million, two hundred twenty-one thousand, four hundred thirty-three".