23171471 has 2 divisors, whose sum is σ = 23171472. Its totient is φ = 23171470.

The previous prime is 23171461. The next prime is 23171497. The reversal of 23171471 is 17417132.

It is a happy number.

It is an a-pointer prime, because the next prime (23171497) can be obtained adding 23171471 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23171471 is a prime.

It is a super-3 number, since 3×23171471³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23171471.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23171461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11585735 + 11585736.

It is an arithmetic number, because the mean of its divisors is an integer number (11585736).

Almost surely, 2^23171471 is an apocalyptic number.

23171471 is a deficient number, since it is larger than the sum of its proper divisors (1).

23171471 is an equidigital number, since it uses as much as digits as its factorization.

23171471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1176, while the sum is 26.

The square root of 23171471 is about 4813.6754148987. The cubic root of 23171471 is about 285.0916746224.

The spelling of 23171471 in words is "twenty-three million, one hundred seventy-one thousand, four hundred seventy-one".