209198422 has 4 divisors (see below), whose sum is σ = 313797636. Its totient is φ = 104599210.

The previous prime is 209198419. The next prime is 209198443. The reversal of 209198422 is 224891902.

209198422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52299604 + ... + 52299607.

It is an arithmetic number, because the mean of its divisors is an integer number (78449409).

Almost surely, 2^209198422 is an apocalyptic number.

209198422 is a deficient number, since it is larger than the sum of its proper divisors (104599214).

209198422 is a wasteful number, since it uses less digits than its factorization.

209198422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104599213.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 209198422 is about 14463.6932351319. The cubic root of 209198422 is about 593.6349584393.

The spelling of 209198422 in words is "two hundred nine million, one hundred ninety-eight thousand, four hundred twenty-two".