23211161 has 4 divisors (see below), whose sum is σ = 23328000. Its totient is φ = 23094324.

The previous prime is 23211151. The next prime is 23211169. The reversal of 23211161 is 16111232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23211161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23211169) 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, 58121 + ... + 58518.

It is an arithmetic number, because the mean of its divisors is an integer number (5832000).

Almost surely, 2^23211161 is an apocalyptic number.

It is an amenable number.

23211161 is a deficient number, since it is larger than the sum of its proper divisors (116839).

23211161 is a wasteful number, since it uses less digits than its factorization.

23211161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116838.

The product of its digits is 72, while the sum is 17.

The square root of 23211161 is about 4817.7962804585. The cubic root of 23211161 is about 285.2543579226.

Adding to 23211161 its reverse (16111232), we get a palindrome (39322393).

It can be divided in two parts, 2321 and 1161, that multiplied together give a triangular number (2694681 = T₂₃₂₁).

The spelling of 23211161 in words is "twenty-three million, two hundred eleven thousand, one hundred sixty-one".