55385785 has 16 divisors (see below), whose sum is σ = 81801216. Its totient is φ = 35057088.

The previous prime is 55385783. The next prime is 55385831. The reversal of 55385785 is 58758355.

It is a cyclic number.

It is not a de Polignac number, because 55385785 - 2¹ = 55385783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55385783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60409 + ... + 61318.

It is an arithmetic number, because the mean of its divisors is an integer number (5112576).

Almost surely, 2^55385785 is an apocalyptic number.

It is an amenable number.

55385785 is a deficient number, since it is larger than the sum of its proper divisors (26415431).

55385785 is a wasteful number, since it uses less digits than its factorization.

55385785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121752.

The product of its digits is 840000, while the sum is 46.

The square root of 55385785 is about 7442.1626561101. The cubic root of 55385785 is about 381.1823400491.

The spelling of 55385785 in words is "fifty-five million, three hundred eighty-five thousand, seven hundred eighty-five".