545221212 has 48 divisors (see below), whose sum is σ = 1366025472. Its totient is φ = 168636160.

The previous prime is 545221163. The next prime is 545221213. The reversal of 545221212 is 212122545.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545221213) 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, 4338 + ... + 33305.

It is an arithmetic number, because the mean of its divisors is an integer number (28458864).

Almost surely, 2^545221212 is an apocalyptic number.

It is an amenable number.

545221212 is an abundant number, since it is smaller than the sum of its proper divisors (820804260).

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

545221212 is a wasteful number, since it uses less digits than its factorization.

545221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37738 (or 37736 counting only the distinct ones).

The product of its digits is 1600, while the sum is 24.

The square root of 545221212 is about 23349.9724196839. The cubic root of 545221212 is about 816.9414175557.

Adding to 545221212 its reverse (212122545), we get a palindrome (757343757).

The spelling of 545221212 in words is "five hundred forty-five million, two hundred twenty-one thousand, two hundred twelve".