23161 has 8 divisors (see below), whose sum is σ = 25920. Its totient is φ = 20592.

The previous prime is 23159. The next prime is 23167. The reversal of 23161 is 16132.

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

It is a cyclic number.

It is not a de Polignac number, because 23161 - 2¹ = 23159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23167) 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, 411 + ... + 463.

It is an arithmetic number, because the mean of its divisors is an integer number (3240).

2²³¹⁶¹ is an apocalyptic number.

It is an amenable number.

23161 is a deficient number, since it is larger than the sum of its proper divisors (2759).

23161 is a wasteful number, since it uses less digits than its factorization.

23161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95.

The product of its digits is 36, while the sum is 13.

The square root of 23161 is about 152.1873844969. The cubic root of 23161 is about 28.5048724613.

Adding to 23161 its reverse (16132), we get a palindrome (39293).

It can be divided in two parts, 231 and 61, that added together give a palindrome (292).

The spelling of 23161 in words is "twenty-three thousand, one hundred sixty-one".