22891123 has 4 divisors (see below), whose sum is σ = 23509840. Its totient is φ = 22272408.

The previous prime is 22891117. The next prime is 22891157. The reversal of 22891123 is 32119822.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22891123 is a prime.

It is a super-2 number, since 2×22891123² = 1048007024402258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22891091 and 22891100.

It is not an unprimeable number, because it can be changed into a prime (22891223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309303 + ... + 309376.

It is an arithmetic number, because the mean of its divisors is an integer number (5877460).

Almost surely, 2^22891123 is an apocalyptic number.

22891123 is a deficient number, since it is larger than the sum of its proper divisors (618717).

22891123 is an equidigital number, since it uses as much as digits as its factorization.

22891123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618716.

The product of its digits is 1728, while the sum is 28.

The square root of 22891123 is about 4784.4668459505. The cubic root of 22891123 is about 283.9372464337.

The spelling of 22891123 in words is "twenty-two million, eight hundred ninety-one thousand, one hundred twenty-three".