55293220 has 24 divisors (see below), whose sum is σ = 116290944. Its totient is φ = 22083936.

The previous prime is 55293191. The next prime is 55293221. The reversal of 55293220 is 2239255.

55293220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55293221) 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 7 ways as a sum of consecutive naturals, for example, 14869 + ... + 18211.

It is an arithmetic number, because the mean of its divisors is an integer number (4845456).

Almost surely, 2^55293220 is an apocalyptic number.

It is an amenable number.

55293220 is an abundant number, since it is smaller than the sum of its proper divisors (60997724).

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

55293220 is a wasteful number, since it uses less digits than its factorization.

55293220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179 (or 4177 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 55293220 is about 7435.9410971309. The cubic root of 55293220 is about 380.9698678530.

The spelling of 55293220 in words is "fifty-five million, two hundred ninety-three thousand, two hundred twenty".