22123391 has 8 divisors (see below), whose sum is σ = 23385600. Its totient is φ = 20871000.

The previous prime is 22123351. The next prime is 22123393. The reversal of 22123391 is 19332122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22123391 - 2¹⁰ = 22122367 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 (22123393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2450 + ... + 7088.

It is an arithmetic number, because the mean of its divisors is an integer number (2923200).

Almost surely, 2^22123391 is an apocalyptic number.

22123391 is a deficient number, since it is larger than the sum of its proper divisors (1262209).

22123391 is a wasteful number, since it uses less digits than its factorization.

22123391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4909.

The product of its digits is 648, while the sum is 23.

The square root of 22123391 is about 4703.5508926767. The cubic root of 22123391 is about 280.7268149561.

The spelling of 22123391 in words is "twenty-two million, one hundred twenty-three thousand, three hundred ninety-one".