55525500 has 144 divisors (see below), whose sum is σ = 182049504. Its totient is φ = 14774400.

The previous prime is 55525499. The next prime is 55525507. The reversal of 55525500 is 552555.

It is a happy number.

55525500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55525507) by changing a digit.

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, 121272 + ... + 121728.

Almost surely, 2^55525500 is an apocalyptic number.

55525500 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 55525500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91024752).

55525500 is an abundant number, since it is smaller than the sum of its proper divisors (126524004).

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

55525500 is a wasteful number, since it uses less digits than its factorization.

55525500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 27.

The square root of 55525500 is about 7451.5434642764. The cubic root of 55525500 is about 381.5025917269.

The spelling of 55525500 in words is "fifty-five million, five hundred twenty-five thousand, five hundred".