56089181 has 2 divisors, whose sum is σ = 56089182. Its totient is φ = 56089180.

The previous prime is 56089177. The next prime is 56089223. The reversal of 56089181 is 18198065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37027225 + 19061956 = 6085^2 + 4366^2 .

It is a cyclic number.

It is not a de Polignac number, because 56089181 - 2² = 56089177 is a prime.

It is a super-2 number, since 2×56089181² = 6291992450501522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56089981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28044590 + 28044591.

It is an arithmetic number, because the mean of its divisors is an integer number (28044591).

Almost surely, 2^56089181 is an apocalyptic number.

It is an amenable number.

56089181 is a deficient number, since it is larger than the sum of its proper divisors (1).

56089181 is an equidigital number, since it uses as much as digits as its factorization.

56089181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 56089181 is about 7489.2710593221. The cubic root of 56089181 is about 382.7892206452.

The spelling of 56089181 in words is "fifty-six million, eighty-nine thousand, one hundred eighty-one".