23117131 has 4 divisors (see below), whose sum is σ = 23145912. Its totient is φ = 23088352.

The previous prime is 23117111. The next prime is 23117141. The reversal of 23117131 is 13171132.

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

It is a cyclic number.

It is not a de Polignac number, because 23117131 - 2⁵ = 23117099 is a prime.

It is a super-2 number, since 2×23117131² = 1068803491342322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23117099 and 23117108.

It is not an unprimeable number, because it can be changed into a prime (23117111) 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, 13150 + ... + 14803.

It is an arithmetic number, because the mean of its divisors is an integer number (5786478).

Almost surely, 2^23117131 is an apocalyptic number.

23117131 is a deficient number, since it is larger than the sum of its proper divisors (28781).

23117131 is an equidigital number, since it uses as much as digits as its factorization.

23117131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28780.

The product of its digits is 126, while the sum is 19.

The square root of 23117131 is about 4808.0277661428. The cubic root of 23117131 is about 284.8686416301.

Adding to 23117131 its reverse (13171132), we get a palindrome (36288263).

The spelling of 23117131 in words is "twenty-three million, one hundred seventeen thousand, one hundred thirty-one".