23512081 has 4 divisors (see below), whose sum is σ = 23642164. Its totient is φ = 23382000.

The previous prime is 23512039. The next prime is 23512087. The reversal of 23512081 is 18021532.

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 7182400 + 16329681 = 2680^2 + 4041^2 .

It is a cyclic number.

It is not a de Polignac number, because 23512081 - 2¹¹ = 23510033 is a prime.

It is a super-3 number, since 3×23512081³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23512087) 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, 64770 + ... + 65131.

It is an arithmetic number, because the mean of its divisors is an integer number (5910541).

Almost surely, 2^23512081 is an apocalyptic number.

It is an amenable number.

23512081 is a deficient number, since it is larger than the sum of its proper divisors (130083).

23512081 is a wasteful number, since it uses less digits than its factorization.

23512081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130082.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 23512081 is about 4848.9257573199. The cubic root of 23512081 is about 286.4817909882.

The spelling of 23512081 in words is "twenty-three million, five hundred twelve thousand, eighty-one".