56704181 has 2 divisors, whose sum is σ = 56704182. Its totient is φ = 56704180.

The previous prime is 56704171. The next prime is 56704199. The reversal of 56704181 is 18140765.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36409156 + 20295025 = 6034^2 + 4505^2 .

It is a cyclic number.

It is not a de Polignac number, because 56704181 - 2¹⁸ = 56442037 is a prime.

It is a super-2 number, since 2×56704181² = 6430728285761522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56704121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28352090 + 28352091.

It is an arithmetic number, because the mean of its divisors is an integer number (28352091).

Almost surely, 2^56704181 is an apocalyptic number.

It is an amenable number.

56704181 is a deficient number, since it is larger than the sum of its proper divisors (1).

56704181 is an equidigital number, since it uses as much as digits as its factorization.

56704181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 56704181 is about 7530.2178587342. The cubic root of 56704181 is about 384.1831921239.

The spelling of 56704181 in words is "fifty-six million, seven hundred four thousand, one hundred eighty-one".