545556220 has 24 divisors (see below), whose sum is σ = 1249820208. Its totient is φ = 198384000.

The previous prime is 545556217. The next prime is 545556239. The reversal of 545556220 is 22655545.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1239681 + ... + 1240120.

It is an arithmetic number, because the mean of its divisors is an integer number (52075842).

Almost surely, 2^545556220 is an apocalyptic number.

It is an amenable number.

545556220 is an abundant number, since it is smaller than the sum of its proper divisors (704263988).

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

545556220 is a wasteful number, since it uses less digits than its factorization.

545556220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2479821 (or 2479819 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 34.

The square root of 545556220 is about 23357.1449453909. The cubic root of 545556220 is about 817.1087049304.

The spelling of 545556220 in words is "five hundred forty-five million, five hundred fifty-six thousand, two hundred twenty".