23116865 has 8 divisors (see below), whose sum is σ = 28195368. Its totient is φ = 18190080.

The previous prime is 23116861. The next prime is 23116867. The reversal of 23116865 is 56861132.

It is a happy number.

It is a Cunningham number, because it is equal to 4808²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 753424 + 22363441 = 868^2 + 4729^2 .

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

It is not a de Polignac number, because 23116865 - 2² = 23116861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23116861) 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, 37592 + ... + 38201.

It is an arithmetic number, because the mean of its divisors is an integer number (3524421).

Almost surely, 2^23116865 is an apocalyptic number.

It is an amenable number.

23116865 is a deficient number, since it is larger than the sum of its proper divisors (5078503).

23116865 is an equidigital number, since it uses as much as digits as its factorization.

23116865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75859.

The product of its digits is 8640, while the sum is 32.

The square root of 23116865 is about 4808.0001039933. Note that the first 3 decimals coincide. The cubic root of 23116865 is about 284.8675490010.

Adding to 23116865 its reverse (56861132), we get a palindrome (79977997).

The spelling of 23116865 in words is "twenty-three million, one hundred sixteen thousand, eight hundred sixty-five".