222051115729 has 27 divisors (see below), whose sum is σ = 240876417873. Its totient is φ = 204654033792.

The previous prime is 222051115717. The next prime is 222051115733. The reversal of 222051115729 is 927511150222.

The square root of 222051115729 is 471223.

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

222051115729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 55636072129 + 166415043600 = 235873^2 + 407940^2 .

It is not a de Polignac number, because 222051115729 - 2⁹ = 222051115217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222051115739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 424571662 + ... + 424572184.

Almost surely, 2^222051115729 is an apocalyptic number.

222051115729 is the 471223-rd square number.

222051115729 is the 235612-nd centered octagonal number.

It is an amenable number.

222051115729 is a deficient number, since it is larger than the sum of its proper divisors (18825302144).

222051115729 is an frugal number, since it uses more digits than its factorization.

222051115729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186 (or 593 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 222051115729 in words is "two hundred twenty-two billion, fifty-one million, one hundred fifteen thousand, seven hundred twenty-nine".