23255681 has 4 divisors (see below), whose sum is σ = 23295492. Its totient is φ = 23215872.

The previous prime is 23255671. The next prime is 23255717. The reversal of 23255681 is 18655232.

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 8317456 + 14938225 = 2884^2 + 3865^2 .

It is a cyclic number.

It is not a de Polignac number, because 23255681 - 2²² = 19061377 is a prime.

It is a super-2 number, since 2×23255681² = 1081653397547522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23255621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19016 + ... + 20201.

It is an arithmetic number, because the mean of its divisors is an integer number (5823873).

Almost surely, 2^23255681 is an apocalyptic number.

It is an amenable number.

23255681 is a deficient number, since it is larger than the sum of its proper divisors (39811).

23255681 is an equidigital number, since it uses as much as digits as its factorization.

23255681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39810.

The product of its digits is 14400, while the sum is 32.

The square root of 23255681 is about 4822.4144367733. The cubic root of 23255681 is about 285.4366181328.

The spelling of 23255681 in words is "twenty-three million, two hundred fifty-five thousand, six hundred eighty-one".