23131617 has 4 divisors (see below), whose sum is σ = 30842160. Its totient is φ = 15421076.

The previous prime is 23131613. The next prime is 23131631. The reversal of 23131617 is 71613132.

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 not a de Polignac number, because 23131617 - 2² = 23131613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23131613) 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 3 ways as a sum of consecutive naturals, for example, 3855267 + ... + 3855272.

It is an arithmetic number, because the mean of its divisors is an integer number (7710540).

Almost surely, 2^23131617 is an apocalyptic number.

It is an amenable number.

23131617 is a deficient number, since it is larger than the sum of its proper divisors (7710543).

23131617 is an equidigital number, since it uses as much as digits as its factorization.

23131617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7710542.

The product of its digits is 756, while the sum is 24.

The square root of 23131617 is about 4809.5339691076. The cubic root of 23131617 is about 284.9281320788.

Adding to 23131617 its reverse (71613132), we get a palindrome (94744749).

The spelling of 23131617 in words is "twenty-three million, one hundred thirty-one thousand, six hundred seventeen".