221544072466052 has 18 divisors (see below), whose sum is σ = 451000433234862. Its totient is φ = 94947459628224.

The previous prime is 221544072465977. The next prime is 221544072466091. The reversal of 221544072466052 is 250664270445122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 162830258166016 + 58713814300036 = 12760496^2 + 7662494^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 565163449973 + ... + 565163450364.

It is an arithmetic number, because the mean of its divisors is an integer number (25055579624159).

Almost surely, 2^{221544072466052} is an apocalyptic number.

It is an amenable number.

221544072466052 is an abundant number, since it is smaller than the sum of its proper divisors (229456360768810).

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

221544072466052 is a wasteful number, since it uses less digits than its factorization.

221544072466052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130326900355 (or 1130326900346 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 50.

The spelling of 221544072466052 in words is "two hundred twenty-one trillion, five hundred forty-four billion, seventy-two million, four hundred sixty-six thousand, fifty-two".