55210100 has 72 divisors (see below), whose sum is σ = 133303968. Its totient is φ = 19676800.

The previous prime is 55210091. The next prime is 55210123. The reversal of 55210100 is 101255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57827 + ... + 58773.

It is an arithmetic number, because the mean of its divisors is an integer number (1851444).

Almost surely, 2^55210100 is an apocalyptic number.

55210100 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 55210100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66651984).

55210100 is an abundant number, since it is smaller than the sum of its proper divisors (78093868).

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

55210100 is a wasteful number, since it uses less digits than its factorization.

55210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025 (or 1018 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 55210100 is about 7430.3499244652. The cubic root of 55210100 is about 380.7788733925.

Adding to 55210100 its reverse (101255), we get a palindrome (55311355).

The spelling of 55210100 in words is "fifty-five million, two hundred ten thousand, one hundred".