22240123391 has 4 divisors (see below), whose sum is σ = 22240513992. Its totient is φ = 22239732792.

The previous prime is 22240123349. The next prime is 22240123393. The reversal of 22240123391 is 19332104222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19332104222 = 2 ⋅9666052111.

It is a cyclic number.

It is not a de Polignac number, because 22240123391 - 2⁶ = 22240123327 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 (22240123393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91505 + ... + 229898.

It is an arithmetic number, because the mean of its divisors is an integer number (5560128498).

Almost surely, 2^22240123391 is an apocalyptic number.

22240123391 is a deficient number, since it is larger than the sum of its proper divisors (390601).

22240123391 is an equidigital number, since it uses as much as digits as its factorization.

22240123391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390600.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 22240123391 in words is "twenty-two billion, two hundred forty million, one hundred twenty-three thousand, three hundred ninety-one".