55291228 has 24 divisors (see below), whose sum is σ = 100696064. Its totient is φ = 26535600.

The previous prime is 55291213. The next prime is 55291297. The reversal of 55291228 is 82219255.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 55291193 and 55291202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13993 + ... + 17503.

Almost surely, 2^55291228 is an apocalyptic number.

It is an amenable number.

55291228 is a deficient number, since it is larger than the sum of its proper divisors (45404836).

55291228 is a wasteful number, since it uses less digits than its factorization.

55291228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3673 (or 3671 counting only the distinct ones).

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

The square root of 55291228 is about 7435.8071518834. The cubic root of 55291228 is about 380.9652928431.

The spelling of 55291228 in words is "fifty-five million, two hundred ninety-one thousand, two hundred twenty-eight".