55042500 has 120 divisors (see below), whose sum is σ = 165322080. Its totient is φ = 14240000.

The previous prime is 55042489. The next prime is 55042501. The reversal of 55042500 is 524055.

55042500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55042501) 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 39 ways as a sum of consecutive naturals, for example, 307411 + ... + 307589.

It is an arithmetic number, because the mean of its divisors is an integer number (1377684).

Almost surely, 2^55042500 is an apocalyptic number.

55042500 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 55042500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82661040).

55042500 is an abundant number, since it is smaller than the sum of its proper divisors (110279580).

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

55042500 is a wasteful number, since it uses less digits than its factorization.

55042500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 55042500 is about 7419.0632831915. The cubic root of 55042500 is about 380.3931756923.

Adding to 55042500 its reverse (524055), we get a palindrome (55566555).

The spelling of 55042500 in words is "fifty-five million, forty-two thousand, five hundred".