198222539 has 4 divisors (see below), whose sum is σ = 198923256. Its totient is φ = 197521824.

The previous prime is 198222517. The next prime is 198222551. The reversal of 198222539 is 935222891.

198222539 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 cyclic number.

It is not a de Polignac number, because 198222539 - 2²⁴ = 181445323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198222496 and 198222505.

It is not an unprimeable number, because it can be changed into a prime (198222559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349934 + ... + 350499.

It is an arithmetic number, because the mean of its divisors is an integer number (49730814).

Almost surely, 2^198222539 is an apocalyptic number.

198222539 is a deficient number, since it is larger than the sum of its proper divisors (700717).

198222539 is an equidigital number, since it uses as much as digits as its factorization.

198222539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700716.

The product of its digits is 77760, while the sum is 41.

The square root of 198222539 is about 14079.1526378543. The cubic root of 198222539 is about 583.0659474056.

The spelling of 198222539 in words is "one hundred ninety-eight million, two hundred twenty-two thousand, five hundred thirty-nine".