55517003281 has 2 divisors, whose sum is σ = 55517003282. Its totient is φ = 55517003280.

The previous prime is 55517003261. The next prime is 55517003287. The reversal of 55517003281 is 18230071555.

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., 54819198225 + 697805056 = 234135^2 + 26416^2 .

It is a cyclic number.

It is not a de Polignac number, because 55517003281 - 2⁷ = 55517003153 is a prime.

It is a super-3 number, since 3×55517003281³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 55517003281.

It is not a weakly prime, because it can be changed into another prime (55517003287) 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, 27758501640 + 27758501641.

It is an arithmetic number, because the mean of its divisors is an integer number (27758501641).

Almost surely, 2^55517003281 is an apocalyptic number.

It is an amenable number.

55517003281 is a deficient number, since it is larger than the sum of its proper divisors (1).

55517003281 is an equidigital number, since it uses as much as digits as its factorization.

55517003281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42000, while the sum is 37.

The spelling of 55517003281 in words is "fifty-five billion, five hundred seventeen million, three thousand, two hundred eighty-one".