55065559 has 2 divisors, whose sum is σ = 55065560. Its totient is φ = 55065558.

The previous prime is 55065557. The next prime is 55065581. The reversal of 55065559 is 95556055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55065559 - 2¹ = 55065557 is a prime.

Together with 55065557, 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 (55065557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27532779 + 27532780.

It is an arithmetic number, because the mean of its divisors is an integer number (27532780).

Almost surely, 2^55065559 is an apocalyptic number.

55065559 is a deficient number, since it is larger than the sum of its proper divisors (1).

55065559 is an equidigital number, since it uses as much as digits as its factorization.

55065559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168750, while the sum is 40.

The square root of 55065559 is about 7420.6171576224. The cubic root of 55065559 is about 380.4462877520.

The spelling of 55065559 in words is "fifty-five million, sixty-five thousand, five hundred fifty-nine".