23122191 has 4 divisors (see below), whose sum is σ = 30829592. Its totient is φ = 15414792.

The previous prime is 23122147. The next prime is 23122213. The reversal of 23122191 is 19122132.

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

It is not a de Polignac number, because 23122191 - 2¹⁴ = 23105807 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 (23122391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3853696 + ... + 3853701.

It is an arithmetic number, because the mean of its divisors is an integer number (7707398).

Almost surely, 2^23122191 is an apocalyptic number.

23122191 is a deficient number, since it is larger than the sum of its proper divisors (7707401).

23122191 is an equidigital number, since it uses as much as digits as its factorization.

23122191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7707400.

The product of its digits is 216, while the sum is 21.

The square root of 23122191 is about 4808.5539406354. The cubic root of 23122191 is about 284.8894246326.

It can be divided in two parts, 231 and 22191, that added together give a palindrome (22422).

The spelling of 23122191 in words is "twenty-three million, one hundred twenty-two thousand, one hundred ninety-one".