56752181 has 2 divisors, whose sum is σ = 56752182. Its totient is φ = 56752180.

The previous prime is 56752151. The next prime is 56752207. The reversal of 56752181 is 18125765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49140100 + 7612081 = 7010^2 + 2759^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56752181 is a prime.

It is a super-2 number, since 2×56752181² = 6441620096513522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56752121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28376090 + 28376091.

It is an arithmetic number, because the mean of its divisors is an integer number (28376091).

Almost surely, 2^56752181 is an apocalyptic number.

It is an amenable number.

56752181 is a deficient number, since it is larger than the sum of its proper divisors (1).

56752181 is an equidigital number, since it uses as much as digits as its factorization.

56752181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 35.

The square root of 56752181 is about 7533.4043433231. The cubic root of 56752181 is about 384.2915650397.

The spelling of 56752181 in words is "fifty-six million, seven hundred fifty-two thousand, one hundred eighty-one".