23171131 has 2 divisors, whose sum is σ = 23171132. Its totient is φ = 23171130.

The previous prime is 23171059. The next prime is 23171147. The reversal of 23171131 is 13117132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23171131 - 2⁹ = 23170619 is a prime.

It is a super-2 number, since 2×23171131² = 1073802623638322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23171099 and 23171108.

It is not a weakly prime, because it can be changed into another prime (23171831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11585565 + 11585566.

It is an arithmetic number, because the mean of its divisors is an integer number (11585566).

Almost surely, 2^23171131 is an apocalyptic number.

23171131 is a deficient number, since it is larger than the sum of its proper divisors (1).

23171131 is an equidigital number, since it uses as much as digits as its factorization.

23171131 is an odious number, because the sum of its binary digits is odd.

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

The square root of 23171131 is about 4813.6400987195. The cubic root of 23171131 is about 285.0902802116.

Adding to 23171131 its reverse (13117132), we get a palindrome (36288263).

The spelling of 23171131 in words is "twenty-three million, one hundred seventy-one thousand, one hundred thirty-one".