23011143 has 4 divisors (see below), whose sum is σ = 30681528. Its totient is φ = 15340760.

The previous prime is 23011141. The next prime is 23011189. The reversal of 23011143 is 34111032.

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

It is a cyclic number.

It is not a de Polignac number, because 23011143 - 2¹ = 23011141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23011141) 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, 3835188 + ... + 3835193.

It is an arithmetic number, because the mean of its divisors is an integer number (7670382).

Almost surely, 2^23011143 is an apocalyptic number.

23011143 is a deficient number, since it is larger than the sum of its proper divisors (7670385).

23011143 is an equidigital number, since it uses as much as digits as its factorization.

23011143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7670384.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 23011143 is about 4796.9931206955. The cubic root of 23011143 is about 284.4326169613.

Adding to 23011143 its reverse (34111032), we get a palindrome (57122175).

The spelling of 23011143 in words is "twenty-three million, eleven thousand, one hundred forty-three".