23189181 has 8 divisors (see below), whose sum is σ = 30962784. Its totient is φ = 15437520.

The previous prime is 23189161. The next prime is 23189191. The reversal of 23189181 is 18198132.

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

It is not a de Polignac number, because 23189181 - 2¹⁰ = 23188157 is a prime.

It is a super-2 number, since 2×23189181² = 1075476230901522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23189161) 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, 2835 + ... + 7376.

It is an arithmetic number, because the mean of its divisors is an integer number (3870348).

Almost surely, 2^23189181 is an apocalyptic number.

It is an amenable number.

23189181 is a deficient number, since it is larger than the sum of its proper divisors (7773603).

23189181 is a wasteful number, since it uses less digits than its factorization.

23189181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10971.

The product of its digits is 3456, while the sum is 33.

The square root of 23189181 is about 4815.5146142443. The cubic root of 23189181 is about 285.1642881650.

The spelling of 23189181 in words is "twenty-three million, one hundred eighty-nine thousand, one hundred eighty-one".