55065281 has 2 divisors, whose sum is σ = 55065282. Its totient is φ = 55065280.

The previous prime is 55065277. The next prime is 55065299. The reversal of 55065281 is 18256055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33535681 + 21529600 = 5791^2 + 4640^2 .

It is a cyclic number.

It is not a de Polignac number, because 55065281 - 2² = 55065277 is a prime.

It is a super-2 number, since 2×55065281² = 6064370343217922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55065221) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27532640 + 27532641.

It is an arithmetic number, because the mean of its divisors is an integer number (27532641).

Almost surely, 2^55065281 is an apocalyptic number.

It is an amenable number.

55065281 is a deficient number, since it is larger than the sum of its proper divisors (1).

55065281 is an equidigital number, since it uses as much as digits as its factorization.

55065281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 55065281 is about 7420.5984260031. The cubic root of 55065281 is about 380.4456475197.

The spelling of 55065281 in words is "fifty-five million, sixty-five thousand, two hundred eighty-one".