23136081 has 4 divisors (see below), whose sum is σ = 30848112. Its totient is φ = 15424052.

The previous prime is 23136059. The next prime is 23136089. The reversal of 23136081 is 18063132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23136081 - 2⁵ = 23136049 is a prime.

It is a super-2 number, since 2×23136081² = 1070556488077122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23136089) 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, 3856011 + ... + 3856016.

It is an arithmetic number, because the mean of its divisors is an integer number (7712028).

Almost surely, 2^23136081 is an apocalyptic number.

It is an amenable number.

23136081 is a deficient number, since it is larger than the sum of its proper divisors (7712031).

23136081 is an equidigital number, since it uses as much as digits as its factorization.

23136081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7712030.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 23136081 is about 4809.9980249476. The cubic root of 23136081 is about 284.9464596255.

The spelling of 23136081 in words is "twenty-three million, one hundred thirty-six thousand, eighty-one".