222805712529 has 45 divisors (see below), whose sum is σ = 335849245963. Its totient is φ = 147203204688.

The previous prime is 222805712491. The next prime is 222805712537. The reversal of 222805712529 is 925217508222.

The square root of 222805712529 is 472023.

It is a perfect power (a square), and thus also a powerful number.

222805712529 is a `hidden beast` number, since 2 + 2 + 28 + 0 + 571 + 2 + 52 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 210804948225 + 12000764304 = 459135^2 + 109548^2 .

It is not a de Polignac number, because 222805712529 - 2¹¹ = 222805710481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222805712929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 760428907 + ... + 760429199.

Almost surely, 2^222805712529 is an apocalyptic number.

222805712529 is the 472023-rd square number.

222805712529 is the 236012-nd centered octagonal number.

It is an amenable number.

222805712529 is a deficient number, since it is larger than the sum of its proper divisors (113043533434).

222805712529 is an frugal number, since it uses more digits than its factorization.

222805712529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 222805712529 in words is "two hundred twenty-two billion, eight hundred five million, seven hundred twelve thousand, five hundred twenty-nine".