56634181 has 2 divisors, whose sum is σ = 56634182. Its totient is φ = 56634180.

The previous prime is 56634163. The next prime is 56634197. The reversal of 56634181 is 18143665.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55741156 + 893025 = 7466^2 + 945^2 .

It is a cyclic number.

It is not a de Polignac number, because 56634181 - 2²³ = 48245573 is a prime.

It is a super-2 number, since 2×56634181² = 6414860915081522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56634481) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28317090 + 28317091.

It is an arithmetic number, because the mean of its divisors is an integer number (28317091).

Almost surely, 2^56634181 is an apocalyptic number.

It is an amenable number.

56634181 is a deficient number, since it is larger than the sum of its proper divisors (1).

56634181 is an equidigital number, since it uses as much as digits as its factorization.

56634181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 34.

The square root of 56634181 is about 7525.5684835101. The cubic root of 56634181 is about 384.0250386053.

The spelling of 56634181 in words is "fifty-six million, six hundred thirty-four thousand, one hundred eighty-one".