23171171 has 4 divisors (see below), whose sum is σ = 23387832. Its totient is φ = 22954512.

The previous prime is 23171147. The next prime is 23171173. The reversal of 23171171 is 17117132.

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 23171171 - 2¹⁸ = 22909027 is a prime.

It is a super-2 number, since 2×23171171² = 1073806331022482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23171173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108170 + ... + 108383.

It is an arithmetic number, because the mean of its divisors is an integer number (5846958).

Almost surely, 2^23171171 is an apocalyptic number.

23171171 is a deficient number, since it is larger than the sum of its proper divisors (216661).

23171171 is a wasteful number, since it uses less digits than its factorization.

23171171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216660.

The product of its digits is 294, while the sum is 23.

The square root of 23171171 is about 4813.6442535775. The cubic root of 23171171 is about 285.0904442607.

The spelling of 23171171 in words is "twenty-three million, one hundred seventy-one thousand, one hundred seventy-one".