23116321 has 4 divisors (see below), whose sum is σ = 23552532. Its totient is φ = 22680112.

The previous prime is 23116309. The next prime is 23116343. The reversal of 23116321 is 12361132.

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 11826721 + 11289600 = 3439^2 + 3360^2 .

It is a cyclic number.

It is not a de Polignac number, because 23116321 - 2⁷ = 23116193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23116021) 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, 218026 + ... + 218131.

It is an arithmetic number, because the mean of its divisors is an integer number (5888133).

Almost surely, 2^23116321 is an apocalyptic number.

It is an amenable number.

23116321 is a deficient number, since it is larger than the sum of its proper divisors (436211).

23116321 is an equidigital number, since it uses as much as digits as its factorization.

23116321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436210.

The product of its digits is 216, while the sum is 19.

The square root of 23116321 is about 4807.9435312824. The cubic root of 23116321 is about 284.8653144252.

Adding to 23116321 its reverse (12361132), we get a palindrome (35477453).

The spelling of 23116321 in words is "twenty-three million, one hundred sixteen thousand, three hundred twenty-one".