55102128 has 80 divisors (see below), whose sum is σ = 154752000. Its totient is φ = 16830720.

The previous prime is 55102121. The next prime is 55102129. The reversal of 55102128 is 82120155.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 55102098 and 55102107.

It is not an unprimeable number, because it can be changed into a prime (55102121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27298 + ... + 29246.

It is an arithmetic number, because the mean of its divisors is an integer number (1934400).

Almost surely, 2^55102128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55102128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77376000).

55102128 is an abundant number, since it is smaller than the sum of its proper divisors (99649872).

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

55102128 is a wasteful number, since it uses less digits than its factorization.

55102128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010 (or 2004 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 55102128 is about 7423.0807620556. The cubic root of 55102128 is about 380.5304871555.

55102128 divided by its sum of digits (24) gives a palindrome (2295922).

The spelling of 55102128 in words is "fifty-five million, one hundred two thousand, one hundred twenty-eight".