222165650 has 24 divisors (see below), whose sum is σ = 472261440. Its totient is φ = 76170960.

The previous prime is 222165641. The next prime is 222165659. The reversal of 222165650 is 56561222.

It is an interprime number because it is at equal distance from previous prime (222165641) and next prime (222165659).

It is not an unprimeable number, because it can be changed into a prime (222165659) 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 11 ways as a sum of consecutive naturals, for example, 317030 + ... + 317729.

It is an arithmetic number, because the mean of its divisors is an integer number (19677560).

Almost surely, 2^222165650 is an apocalyptic number.

222165650 is an abundant number, since it is smaller than the sum of its proper divisors (250095790).

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

222165650 is a wasteful number, since it uses less digits than its factorization.

222165650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634778 (or 634773 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 222165650 is about 14905.2222392019. Note that the first 4 decimals coincide. The cubic root of 222165650 is about 605.6554606401.

The spelling of 222165650 in words is "two hundred twenty-two million, one hundred sixty-five thousand, six hundred fifty".