23087165 has 4 divisors (see below), whose sum is σ = 27704604. Its totient is φ = 18469728.

The previous prime is 23087159. The next prime is 23087177. The reversal of 23087165 is 56178032.

23087165 = T₁₇₄₇ + T₁₇₄₈ + ... + T₁₇₆₁.

It is a happy number.

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 3541924 + 19545241 = 1882^2 + 4421^2 .

It is a cyclic number.

It is not a de Polignac number, because 23087165 - 2¹² = 23083069 is a prime.

It is a Duffinian 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, 2308712 + ... + 2308721.

It is an arithmetic number, because the mean of its divisors is an integer number (6926151).

Almost surely, 2^23087165 is an apocalyptic number.

It is an amenable number.

23087165 is a deficient number, since it is larger than the sum of its proper divisors (4617439).

23087165 is an equidigital number, since it uses as much as digits as its factorization.

23087165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4617438.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 23087165 is about 4804.9105090522. The cubic root of 23087165 is about 284.7454996934.

The spelling of 23087165 in words is "twenty-three million, eighty-seven thousand, one hundred sixty-five".