198522139 has 16 divisors (see below), whose sum is σ = 211115520. Its totient is φ = 186389280.

The previous prime is 198522133. The next prime is 198522151. The reversal of 198522139 is 931225891.

It is a cyclic number.

It is not a de Polignac number, because 198522139 - 2⁷ = 198522011 is a prime.

It is a super-2 number, since 2×198522139² = 78822079346270642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198522133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160654 + ... + 161884.

It is an arithmetic number, because the mean of its divisors is an integer number (13194720).

Almost surely, 2^198522139 is an apocalyptic number.

198522139 is a deficient number, since it is larger than the sum of its proper divisors (12593381).

198522139 is a wasteful number, since it uses less digits than its factorization.

198522139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410.

The product of its digits is 38880, while the sum is 40.

The square root of 198522139 is about 14089.7884654100. The cubic root of 198522139 is about 583.3595544857.

The spelling of 198522139 in words is "one hundred ninety-eight million, five hundred twenty-two thousand, one hundred thirty-nine".