55021104 has 60 divisors (see below), whose sum is σ = 154906752. Its totient is φ = 18230400.

The previous prime is 55021103. The next prime is 55021111. The reversal of 55021104 is 40112055.

55021104 is a `hidden beast` number, since 550 + 2 + 110 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (55021103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25009 + ... + 27119.

Almost surely, 2^55021104 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 55021104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77453376).

55021104 is an abundant number, since it is smaller than the sum of its proper divisors (99885648).

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

55021104 is a wasteful number, since it uses less digits than its factorization.

55021104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306 (or 2297 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 55021104 is about 7417.6211820233. The cubic root of 55021104 is about 380.3438807705.

Adding to 55021104 its reverse (40112055), we get a palindrome (95133159).

The spelling of 55021104 in words is "fifty-five million, twenty-one thousand, one hundred four".