55516481 has 2 divisors, whose sum is σ = 55516482. Its totient is φ = 55516480.

The previous prime is 55516471. The next prime is 55516523. The reversal of 55516481 is 18461555.

It is a happy number.

55516481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51552400 + 3964081 = 7180^2 + 1991^2 .

It is a cyclic number.

It is not a de Polignac number, because 55516481 - 2¹⁰ = 55515457 is a prime.

It is a super-3 number, since 3×55516481³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55516471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27758240 + 27758241.

It is an arithmetic number, because the mean of its divisors is an integer number (27758241).

Almost surely, 2^55516481 is an apocalyptic number.

It is an amenable number.

55516481 is a deficient number, since it is larger than the sum of its proper divisors (1).

55516481 is an equidigital number, since it uses as much as digits as its factorization.

55516481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24000, while the sum is 35.

The square root of 55516481 is about 7450.9382630646. The cubic root of 55516481 is about 381.4819348024.

The spelling of 55516481 in words is "fifty-five million, five hundred sixteen thousand, four hundred eighty-one".