22133891 has 16 divisors (see below), whose sum is σ = 24681888. Its totient is φ = 19718400.

The previous prime is 22133869. The next prime is 22133893. The reversal of 22133891 is 19833122.

It is not a de Polignac number, because 22133891 - 2⁶ = 22133827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22133893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69665 + ... + 69981.

It is an arithmetic number, because the mean of its divisors is an integer number (1542618).

Almost surely, 2^22133891 is an apocalyptic number.

22133891 is a deficient number, since it is larger than the sum of its proper divisors (2547997).

22133891 is a wasteful number, since it uses less digits than its factorization.

22133891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502.

The product of its digits is 2592, while the sum is 29.

The square root of 22133891 is about 4704.6669382646. Note that the first 3 decimals coincide. The cubic root of 22133891 is about 280.7712199233.

The spelling of 22133891 in words is "twenty-two million, one hundred thirty-three thousand, eight hundred ninety-one".