23271161 has 4 divisors (see below), whose sum is σ = 23282532. Its totient is φ = 23259792.

The previous prime is 23271139. The next prime is 23271167. The reversal of 23271161 is 16117232.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 765625 + 22505536 = 875^2 + 4744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23271161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23271167) 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, 1670 + ... + 7023.

It is an arithmetic number, because the mean of its divisors is an integer number (5820633).

Almost surely, 2^23271161 is an apocalyptic number.

It is an amenable number.

23271161 is a deficient number, since it is larger than the sum of its proper divisors (11371).

23271161 is an equidigital number, since it uses as much as digits as its factorization.

23271161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11370.

The product of its digits is 504, while the sum is 23.

The square root of 23271161 is about 4824.0191749204. The cubic root of 23271161 is about 285.4999371245.

Adding to 23271161 its reverse (16117232), we get a palindrome (39388393).

It can be divided in two parts, 23271 and 161, that added together give a palindrome (23432).

The spelling of 23271161 in words is "twenty-three million, two hundred seventy-one thousand, one hundred sixty-one".