55975500 has 144 divisors (see below), whose sum is σ = 201923904. Its totient is φ = 12787200.

The previous prime is 55975489. The next prime is 55975511. The reversal of 55975500 is 557955.

It is a happy number.

55975500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55975489) and next prime (55975511).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 47 ways as a sum of consecutive naturals, for example, 30612 + ... + 32388.

Almost surely, 2^55975500 is an apocalyptic number.

55975500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55975500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100961952).

55975500 is an abundant number, since it is smaller than the sum of its proper divisors (145948404).

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

55975500 is a wasteful number, since it uses less digits than its factorization.

55975500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809 (or 1794 counting only the distinct ones).

The product of its (nonzero) digits is 39375, while the sum is 36.

The square root of 55975500 is about 7481.6776193578. The cubic root of 55975500 is about 382.5304345897.

The spelling of 55975500 in words is "fifty-five million, nine hundred seventy-five thousand, five hundred".