222645253609 has 3 divisors (see below), whose sum is σ = 222645725463. Its totient is φ = 222644781756.

The previous prime is 222645253601. The next prime is 222645253673. The reversal of 222645253609 is 906352546222.

The square root of 222645253609 is 471853.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 22095336025 + 200549917584 = 148645^2 + 447828^2 .

It is not a de Polignac number, because 222645253609 - 2³ = 222645253601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222645253601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 235927 + ... + 707779.

It is an arithmetic number, because the mean of its divisors is an integer number (74215241821).

Almost surely, 2^222645253609 is an apocalyptic number.

222645253609 is the 471853-rd square number.

222645253609 is the 235927-th centered octagonal number.

It is an amenable number.

222645253609 is a deficient number, since it is larger than the sum of its proper divisors (471854).

222645253609 is an frugal number, since it uses more digits than its factorization.

222645253609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943706 (or 471853 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 222645253609 in words is "two hundred twenty-two billion, six hundred forty-five million, two hundred fifty-three thousand, six hundred nine".