23291161 has 4 divisors (see below), whose sum is σ = 23610292. Its totient is φ = 22972032.

The previous prime is 23291153. The next prime is 23291171. The reversal of 23291161 is 16119232.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19527561 + 3763600 = 4419^2 + 1940^2 .

It is a cyclic number.

It is not a de Polignac number, because 23291161 - 2³ = 23291153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23291141) 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, 159456 + ... + 159601.

It is an arithmetic number, because the mean of its divisors is an integer number (5902573).

Almost surely, 2^23291161 is an apocalyptic number.

It is an amenable number.

23291161 is a deficient number, since it is larger than the sum of its proper divisors (319131).

23291161 is an equidigital number, since it uses as much as digits as its factorization.

23291161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319130.

The product of its digits is 648, while the sum is 25.

The square root of 23291161 is about 4826.0916899703. The cubic root of 23291161 is about 285.5817030455.

The spelling of 23291161 in words is "twenty-three million, two hundred ninety-one thousand, one hundred sixty-one".