22333331 has 4 divisors (see below), whose sum is σ = 22509312. Its totient is φ = 22157352.

The previous prime is 22333321. The next prime is 22333343. The reversal of 22333331 is 13333322.

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

It is a cyclic number.

It is not a de Polignac number, because 22333331 - 2¹⁸ = 22071187 is a prime.

It is a super-2 number, since 2×22333331² = 997555347111122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22333301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87800 + ... + 88053.

It is an arithmetic number, because the mean of its divisors is an integer number (5627328).

Almost surely, 2^22333331 is an apocalyptic number.

22333331 is a deficient number, since it is larger than the sum of its proper divisors (175981).

22333331 is a wasteful number, since it uses less digits than its factorization.

22333331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175980.

The product of its digits is 972, while the sum is 20.

The square root of 22333331 is about 4725.8153793816. The cubic root of 22333331 is about 281.6120068688.

Adding to 22333331 its reverse (13333322), we get a palindrome (35666653).

Subtracting from 22333331 its reverse (13333322), we obtain a palindrome (9000009).

The spelling of 22333331 in words is "twenty-two million, three hundred thirty-three thousand, three hundred thirty-one".