55032621228 has 108 divisors (see below), whose sum is σ = 153188282520. Its totient is φ = 16646003712.

The previous prime is 55032621227. The next prime is 55032621229. The reversal of 55032621228 is 82212623055.

It is a happy number.

55032621228 is a `hidden beast` number, since 5 + 5 + 0 + 3 + 2 + 621 + 2 + 28 = 666.

It is an interprime number because it is at equal distance from previous prime (55032621227) and next prime (55032621229).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 55032621192 and 55032621201.

It is not an unprimeable number, because it can be changed into a prime (55032621227) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 282300 + ... + 435612.

Almost surely, 2^55032621228 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 55032621228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76594141260).

55032621228 is an abundant number, since it is smaller than the sum of its proper divisors (98155661292).

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

55032621228 is a wasteful number, since it uses less digits than its factorization.

55032621228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153408 (or 153390 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 55032621228 in words is "fifty-five billion, thirty-two million, six hundred twenty-one thousand, two hundred twenty-eight".