23031871 has 4 divisors (see below), whose sum is σ = 23654392. Its totient is φ = 22409352.

The previous prime is 23031863. The next prime is 23031881. The reversal of 23031871 is 17813032.

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 23031871 - 2³ = 23031863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23031881) 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, 311205 + ... + 311278.

It is an arithmetic number, because the mean of its divisors is an integer number (5913598).

Almost surely, 2^23031871 is an apocalyptic number.

23031871 is a deficient number, since it is larger than the sum of its proper divisors (622521).

23031871 is an equidigital number, since it uses as much as digits as its factorization.

23031871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622520.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 23031871 is about 4799.1531544638. The cubic root of 23031871 is about 284.5179951615.

The spelling of 23031871 in words is "twenty-three million, thirty-one thousand, eight hundred seventy-one".