23555111 has 2 divisors, whose sum is σ = 23555112. Its totient is φ = 23555110.

The previous prime is 23555039. The next prime is 23555113. The reversal of 23555111 is 11155532.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23555111 is a prime.

It is a Sophie Germain prime.

Together with 23555113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23555113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11777555 + 11777556.

It is an arithmetic number, because the mean of its divisors is an integer number (11777556).

Almost surely, 2^23555111 is an apocalyptic number.

23555111 is a deficient number, since it is larger than the sum of its proper divisors (1).

23555111 is an equidigital number, since it uses as much as digits as its factorization.

23555111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 750, while the sum is 23.

The square root of 23555111 is about 4853.3607943362. The cubic root of 23555111 is about 286.6564501196.

The spelling of 23555111 in words is "twenty-three million, five hundred fifty-five thousand, one hundred eleven".