55853550 has 72 divisors (see below), whose sum is σ = 155651496. Its totient is φ = 14891040.

The previous prime is 55853519. The next prime is 55853563. The reversal of 55853550 is 5535855.

55853550 is a `hidden beast` number, since 5 + 58 + 53 + 550 = 666.

55853550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9852 + ... + 14448.

Almost surely, 2^55853550 is an apocalyptic number.

55853550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55853550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77825748).

55853550 is an abundant number, since it is smaller than the sum of its proper divisors (99797946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55853550 is a wasteful number, since it uses less digits than its factorization.

55853550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4624 (or 4607 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The square root of 55853550 is about 7473.5232655020. The cubic root of 55853550 is about 382.2524349590.

The spelling of 55853550 in words is "fifty-five million, eight hundred fifty-three thousand, five hundred fifty".