222487209 has 16 divisors (see below), whose sum is σ = 376698240. Its totient is φ = 127135440.

The previous prime is 222487201. The next prime is 222487229. The reversal of 222487209 is 902784222.

It is a happy number.

It is not a de Polignac number, because 222487209 - 2³ = 222487201 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (222487201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588402 + ... + 588779.

It is an arithmetic number, because the mean of its divisors is an integer number (23543640).

Almost surely, 2^222487209 is an apocalyptic number.

It is an amenable number.

222487209 is a deficient number, since it is larger than the sum of its proper divisors (154211031).

222487209 is a wasteful number, since it uses less digits than its factorization.

222487209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177197 (or 1177191 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 222487209 is about 14916.0051287200. The cubic root of 222487209 is about 605.9475251102.

The spelling of 222487209 in words is "two hundred twenty-two million, four hundred eighty-seven thousand, two hundred nine".