22128133 has 4 divisors (see below), whose sum is σ = 22150828. Its totient is φ = 22105440.

The previous prime is 22128121. The next prime is 22128143. The reversal of 22128133 is 33182122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33182122 = 2 ⋅16591061.

It can be written as a sum of positive squares in 2 ways, for example, as 18679684 + 3448449 = 4322^2 + 1857^2 .

It is a cyclic number.

It is not a de Polignac number, because 22128133 - 2¹⁷ = 21997061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22128143) 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, 9816 + ... + 11857.

It is an arithmetic number, because the mean of its divisors is an integer number (5537707).

Almost surely, 2^22128133 is an apocalyptic number.

It is an amenable number.

22128133 is a deficient number, since it is larger than the sum of its proper divisors (22695).

22128133 is a wasteful number, since it uses less digits than its factorization.

22128133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22694.

The product of its digits is 576, while the sum is 22.

The square root of 22128133 is about 4704.0549529103. The cubic root of 22128133 is about 280.7468708245.

The spelling of 22128133 in words is "twenty-two million, one hundred twenty-eight thousand, one hundred thirty-three".