55290224 has 30 divisors (see below), whose sum is σ = 117752880. Its totient is φ = 25131040.

The previous prime is 55290223. The next prime is 55290241. The reversal of 55290224 is 42209255.

55290224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55290223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12344 + ... + 16215.

It is an arithmetic number, because the mean of its divisors is an integer number (3925096).

Almost surely, 2^55290224 is an apocalyptic number.

It is an amenable number.

55290224 is an abundant number, since it is smaller than the sum of its proper divisors (62462656).

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

55290224 is a wasteful number, since it uses less digits than its factorization.

55290224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28589 (or 28572 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 55290224 is about 7435.7396404124. The cubic root of 55290224 is about 380.9629869230.

Adding to 55290224 its reverse (42209255), we get a palindrome (97499479).

The spelling of 55290224 in words is "fifty-five million, two hundred ninety thousand, two hundred twenty-four".