55393785 has 24 divisors (see below), whose sum is σ = 97179264. Its totient is φ = 29185440.

The previous prime is 55393781. The next prime is 55393813. The reversal of 55393785 is 58739355.

55393785 is a `hidden beast` number, since 5 + 539 + 37 + 85 = 666.

It is not a de Polignac number, because 55393785 - 2² = 55393781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55393785.

It is not an unprimeable number, because it can be changed into a prime (55393781) 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 in 23 ways as a sum of consecutive naturals, for example, 3681 + ... + 11150.

It is an arithmetic number, because the mean of its divisors is an integer number (4049136).

Almost surely, 2^55393785 is an apocalyptic number.

It is an amenable number.

55393785 is a deficient number, since it is larger than the sum of its proper divisors (41785479).

55393785 is a wasteful number, since it uses less digits than its factorization.

55393785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14925 (or 14922 counting only the distinct ones).

The product of its digits is 567000, while the sum is 45.

The square root of 55393785 is about 7442.7001148777. The cubic root of 55393785 is about 381.2006920017.

The spelling of 55393785 in words is "fifty-five million, three hundred ninety-three thousand, seven hundred eighty-five".