55053220 has 48 divisors (see below), whose sum is σ = 118879488. Its totient is φ = 21407360.

The previous prime is 55053217. The next prime is 55053221. The reversal of 55053220 is 2235055.

It is a junction number, because it is equal to n+sod(n) for n = 55053191 and 55053200.

It is not an unprimeable number, because it can be changed into a prime (55053221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176865 + ... + 177175.

It is an arithmetic number, because the mean of its divisors is an integer number (2476656).

Almost surely, 2^55053220 is an apocalyptic number.

It is an amenable number.

55053220 is an abundant number, since it is smaller than the sum of its proper divisors (63826268).

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

55053220 is a wasteful number, since it uses less digits than its factorization.

55053220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 55053220 is about 7419.7857111914. The cubic root of 55053220 is about 380.4178690362.

Adding to 55053220 its reverse (2235055), we get a palindrome (57288275).

The spelling of 55053220 in words is "fifty-five million, fifty-three thousand, two hundred twenty".