23116405 has 16 divisors (see below), whose sum is σ = 30023280. Its totient is φ = 16985088.

The previous prime is 23116367. The next prime is 23116409. The reversal of 23116405 is 50461132.

It can be written as a sum of positive squares in 8 ways, for example, as 1270129 + 21846276 = 1127^2 + 4674^2 .

It is a cyclic number.

It is not a de Polignac number, because 23116405 - 2⁹ = 23115893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23116409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14109 + ... + 15661.

It is an arithmetic number, because the mean of its divisors is an integer number (1876455).

Almost surely, 2^23116405 is an apocalyptic number.

It is an amenable number.

23116405 is a deficient number, since it is larger than the sum of its proper divisors (6906875).

23116405 is a wasteful number, since it uses less digits than its factorization.

23116405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 23116405 is about 4807.9522668180. The cubic root of 23116405 is about 284.8656594723.

Adding to 23116405 its reverse (50461132), we get a palindrome (73577537).

The spelling of 23116405 in words is "twenty-three million, one hundred sixteen thousand, four hundred five".