55055587 has 2 divisors, whose sum is σ = 55055588. Its totient is φ = 55055586.

The previous prime is 55055569. The next prime is 55055591. The reversal of 55055587 is 78555055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55055587 - 2¹¹ = 55053539 is a prime.

It is a super-2 number, since 2×55055587² = 6062235319829138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55055387) 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, 27527793 + 27527794.

It is an arithmetic number, because the mean of its divisors is an integer number (27527794).

Almost surely, 2^55055587 is an apocalyptic number.

55055587 is a deficient number, since it is larger than the sum of its proper divisors (1).

55055587 is an equidigital number, since it uses as much as digits as its factorization.

55055587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 175000, while the sum is 40.

The square root of 55055587 is about 7419.9452154312. The cubic root of 55055587 is about 380.4233209497.

The spelling of 55055587 in words is "fifty-five million, fifty-five thousand, five hundred eighty-seven".