55610550 has 144 divisors (see below), whose sum is σ = 162489600. Its totient is φ = 14113440.

The previous prime is 55610531. The next prime is 55610551. The reversal of 55610550 is 5501655.

55610550 is a `hidden beast` number, since 55 + 61 + 0 + 550 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55610551) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 279351 + ... + 279549.

It is an arithmetic number, because the mean of its divisors is an integer number (1128400).

Almost surely, 2^55610550 is an apocalyptic number.

55610550 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 55610550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81244800).

55610550 is an abundant number, since it is smaller than the sum of its proper divisors (106879050).

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

55610550 is a wasteful number, since it uses less digits than its factorization.

55610550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 55610550 is about 7457.2481519660. The cubic root of 55610550 is about 381.6972785102.

The spelling of 55610550 in words is "fifty-five million, six hundred ten thousand, five hundred fifty".