23311871 has 4 divisors (see below), whose sum is σ = 25431144. Its totient is φ = 21192600.

The previous prime is 23311867. The next prime is 23311877. The reversal of 23311871 is 17811332.

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

It is not a de Polignac number, because 23311871 - 2² = 23311867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23311871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23311877) 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, 1059620 + ... + 1059641.

It is an arithmetic number, because the mean of its divisors is an integer number (6357786).

Almost surely, 2^23311871 is an apocalyptic number.

23311871 is a deficient number, since it is larger than the sum of its proper divisors (2119273).

23311871 is a wasteful number, since it uses less digits than its factorization.

23311871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119272.

The product of its digits is 1008, while the sum is 26.

The square root of 23311871 is about 4828.2368417467. The cubic root of 23311871 is about 285.6663223416. Note that the first 3 decimals are identical.

The spelling of 23311871 in words is "twenty-three million, three hundred eleven thousand, eight hundred seventy-one".