55433220 has 48 divisors (see below), whose sum is σ = 161965440. Its totient is φ = 14139136.

The previous prime is 55433171. The next prime is 55433221. The reversal of 55433220 is 2233455.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55433221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18705 + ... + 21464.

It is an arithmetic number, because the mean of its divisors is an integer number (3374280).

Almost surely, 2^55433220 is an apocalyptic number.

It is an amenable number.

55433220 is an abundant number, since it is smaller than the sum of its proper divisors (106532220).

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

55433220 is a wasteful number, since it uses less digits than its factorization.

55433220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40204 (or 40202 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 55433220 is about 7445.3488836991. The cubic root of 55433220 is about 381.2911298456.

Adding to 55433220 its reverse (2233455), we get a palindrome (57666675).

The spelling of 55433220 in words is "fifty-five million, four hundred thirty-three thousand, two hundred twenty".