23216042165 has 4 divisors (see below), whose sum is σ = 27859250604. Its totient is φ = 18572833728.

The previous prime is 23216042149. The next prime is 23216042173. The reversal of 23216042165 is 56124061232.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9518148721 + 13697893444 = 97561^2 + 117038^2 .

It is a cyclic number.

It is not a de Polignac number, because 23216042165 - 2⁴ = 23216042149 is a prime.

It is a super-2 number, since 2×23216042165² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2321604212 + ... + 2321604221.

It is an arithmetic number, because the mean of its divisors is an integer number (6964812651).

Almost surely, 2^23216042165 is an apocalyptic number.

It is an amenable number.

23216042165 is a deficient number, since it is larger than the sum of its proper divisors (4643208439).

23216042165 is an equidigital number, since it uses as much as digits as its factorization.

23216042165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4643208438.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 23216042165 in words is "twenty-three billion, two hundred sixteen million, forty-two thousand, one hundred sixty-five".