22123491 has 32 divisors (see below), whose sum is σ = 33976320. Its totient is φ = 12700800.

The previous prime is 22123489. The next prime is 22123499. The reversal of 22123491 is 19432122.

It is not a de Polignac number, because 22123491 - 2¹ = 22123489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22123499) 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 31 ways as a sum of consecutive naturals, for example, 34746 + ... + 35376.

It is an arithmetic number, because the mean of its divisors is an integer number (1061760).

Almost surely, 2^22123491 is an apocalyptic number.

22123491 is a deficient number, since it is larger than the sum of its proper divisors (11852829).

22123491 is a wasteful number, since it uses less digits than its factorization.

22123491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707.

The product of its digits is 864, while the sum is 24.

The square root of 22123491 is about 4703.5615229313. The cubic root of 22123491 is about 280.7272379268.

The spelling of 22123491 in words is "twenty-two million, one hundred twenty-three thousand, four hundred ninety-one".