23008581 has 6 divisors (see below), whose sum is σ = 33234630. Its totient is φ = 15339048.

The previous prime is 23008577. The next prime is 23008589. The reversal of 23008581 is 18580032.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14062500 + 8946081 = 3750^2 + 2991^2 .

It is not a de Polignac number, because 23008581 - 2² = 23008577 is a prime.

It is a super-2 number, since 2×23008581² = 1058789599267122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23008589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1278246 + ... + 1278263.

It is an arithmetic number, because the mean of its divisors is an integer number (5539105).

Almost surely, 2^23008581 is an apocalyptic number.

It is an amenable number.

23008581 is a deficient number, since it is larger than the sum of its proper divisors (10226049).

23008581 is a wasteful number, since it uses less digits than its factorization.

23008581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2556515 (or 2556512 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 23008581 is about 4796.7260709780. The cubic root of 23008581 is about 284.4220605770.

The spelling of 23008581 in words is "twenty-three million, eight thousand, five hundred eighty-one".