55219228 has 24 divisors (see below), whose sum is σ = 101314080. Its totient is φ = 26283840.

The previous prime is 55219223. The next prime is 55219237. The reversal of 55219228 is 82291255.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 55219193 and 55219202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55219223) 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 7 ways as a sum of consecutive naturals, for example, 19758 + ... + 22378.

It is an arithmetic number, because the mean of its divisors is an integer number (4221420).

Almost surely, 2^55219228 is an apocalyptic number.

It is an amenable number.

55219228 is a deficient number, since it is larger than the sum of its proper divisors (46094852).

55219228 is a wasteful number, since it uses less digits than its factorization.

55219228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2877 (or 2875 counting only the distinct ones).

The product of its digits is 14400, while the sum is 34.

The square root of 55219228 is about 7430.9641366380. The cubic root of 55219228 is about 380.7998572222.

The spelling of 55219228 in words is "fifty-five million, two hundred nineteen thousand, two hundred twenty-eight".