55242224 has 20 divisors (see below), whose sum is σ = 107180640. Its totient is φ = 27582720.

The previous prime is 55242199. The next prime is 55242241. The reversal of 55242224 is 42224255.

It is a junction number, because it is equal to n+sod(n) for n = 55242193 and 55242202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12137 + ... + 16055.

It is an arithmetic number, because the mean of its divisors is an integer number (5359032).

Almost surely, 2^55242224 is an apocalyptic number.

It is an amenable number.

55242224 is a deficient number, since it is larger than the sum of its proper divisors (51938416).

55242224 is a wasteful number, since it uses less digits than its factorization.

55242224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4808 (or 4802 counting only the distinct ones).

The product of its digits is 6400, while the sum is 26.

The square root of 55242224 is about 7432.5112848888. The cubic root of 55242224 is about 380.8527111436.

Adding to 55242224 its reverse (42224255), we get a palindrome (97466479).

The spelling of 55242224 in words is "fifty-five million, two hundred forty-two thousand, two hundred twenty-four".