55530228 has 48 divisors (see below), whose sum is σ = 147752640. Its totient is φ = 16080384.

The previous prime is 55530227. The next prime is 55530253. The reversal of 55530228 is 82203555.

It is a junction number, because it is equal to n+sod(n) for n = 55530195 and 55530204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55530227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7818 + ... + 13121.

It is an arithmetic number, because the mean of its divisors is an integer number (3078180).

Almost surely, 2^55530228 is an apocalyptic number.

It is an amenable number.

55530228 is an abundant number, since it is smaller than the sum of its proper divisors (92222412).

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

55530228 is a wasteful number, since it uses less digits than its factorization.

55530228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20976 (or 20974 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 55530228 is about 7451.8607072328. The cubic root of 55530228 is about 381.5134197433.

The spelling of 55530228 in words is "fifty-five million, five hundred thirty thousand, two hundred twenty-eight".