56823181 has 2 divisors, whose sum is σ = 56823182. Its totient is φ = 56823180.

The previous prime is 56823161. The next prime is 56823187. The reversal of 56823181 is 18132865.

56823181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50893956 + 5929225 = 7134^2 + 2435^2 .

It is a cyclic number.

It is not a de Polignac number, because 56823181 - 2¹¹ = 56821133 is a prime.

It is a super-2 number, since 2×56823181² = 6457747797917522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56823187) 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 as a sum of consecutive naturals, namely, 28411590 + 28411591.

It is an arithmetic number, because the mean of its divisors is an integer number (28411591).

Almost surely, 2^56823181 is an apocalyptic number.

It is an amenable number.

56823181 is a deficient number, since it is larger than the sum of its proper divisors (1).

56823181 is an equidigital number, since it uses as much as digits as its factorization.

56823181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 34.

The square root of 56823181 is about 7538.1152153572. The cubic root of 56823181 is about 384.4517546591.

The spelling of 56823181 in words is "fifty-six million, eight hundred twenty-three thousand, one hundred eighty-one".