222500665 has 8 divisors (see below), whose sum is σ = 268357320. Its totient is φ = 177096192.

The previous prime is 222500653. The next prime is 222500687. The reversal of 222500665 is 566005222.

222500665 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 29735209 + 192765456 = 5453^2 + 13884^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222500665 - 2¹⁵ = 222467897 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111960 + ... + 113929.

It is an arithmetic number, because the mean of its divisors is an integer number (33544665).

Almost surely, 2^222500665 is an apocalyptic number.

It is an amenable number.

222500665 is a deficient number, since it is larger than the sum of its proper divisors (45856655).

222500665 is a wasteful number, since it uses less digits than its factorization.

222500665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226091.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 222500665 is about 14916.4561810103. The cubic root of 222500665 is about 605.9597407420.

Adding to 222500665 its reverse (566005222), we get a palindrome (788505887).

The spelling of 222500665 in words is "two hundred twenty-two million, five hundred thousand, six hundred sixty-five".