55022500 has 60 divisors (see below), whose sum is σ = 129655372. Its totient is φ = 20304000.

The previous prime is 55022491. The next prime is 55022507. The reversal of 55022500 is 522055.

55022500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 10 ways, for example, as 51753636 + 3268864 = 7194^2 + 1808^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55022507) 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 19 ways as a sum of consecutive naturals, for example, 31654 + ... + 33346.

Almost surely, 2^55022500 is an apocalyptic number.

55022500 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 55022500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64827686).

55022500 is an abundant number, since it is smaller than the sum of its proper divisors (74632872).

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

55022500 is a wasteful number, since it uses less digits than its factorization.

55022500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730 (or 1713 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 55022500 is about 7417.7152816753. The cubic root of 55022500 is about 380.3470974488.

Adding to 55022500 its reverse (522055), we get a palindrome (55544555).

The spelling of 55022500 in words is "fifty-five million, twenty-two thousand, five hundred".