55680181 has 2 divisors, whose sum is σ = 55680182. Its totient is φ = 55680180.

The previous prime is 55680179. The next prime is 55680187. The reversal of 55680181 is 18108655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29322225 + 26357956 = 5415^2 + 5134^2 .

It is a cyclic number.

It is not a de Polignac number, because 55680181 - 2¹ = 55680179 is a prime.

It is a super-2 number, since 2×55680181² = 6200565112385522, which contains 22 as substring.

Together with 55680179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55680187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27840090 + 27840091.

It is an arithmetic number, because the mean of its divisors is an integer number (27840091).

Almost surely, 2^55680181 is an apocalyptic number.

It is an amenable number.

55680181 is a deficient number, since it is larger than the sum of its proper divisors (1).

55680181 is an equidigital number, since it uses as much as digits as its factorization.

55680181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 34.

The square root of 55680181 is about 7461.9153707342. The cubic root of 55680181 is about 381.8565221428.

The spelling of 55680181 in words is "fifty-five million, six hundred eighty thousand, one hundred eighty-one".