209072222 has 32 divisors (see below), whose sum is σ = 339072480. Its totient is φ = 96332800.

The previous prime is 209072203. The next prime is 209072233. The reversal of 209072222 is 222270902.

209072222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×209072222² = 87422388024034568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 209072191 and 209072200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367154 + ... + 367722.

It is an arithmetic number, because the mean of its divisors is an integer number (10596015).

Almost surely, 2^209072222 is an apocalyptic number.

209072222 is a deficient number, since it is larger than the sum of its proper divisors (130000258).

209072222 is a wasteful number, since it uses less digits than its factorization.

209072222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 209072222 is about 14459.3299291496. The cubic root of 209072222 is about 593.5155633362.

The spelling of 209072222 in words is "two hundred nine million, seventy-two thousand, two hundred twenty-two".