198254111 has 4 divisors (see below), whose sum is σ = 216277224. Its totient is φ = 180231000.

The previous prime is 198254099. The next prime is 198254137. The reversal of 198254111 is 111452891.

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 198254111 - 2⁶ = 198254047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198254141) 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, 9011540 + ... + 9011561.

It is an arithmetic number, because the mean of its divisors is an integer number (54069306).

Almost surely, 2^198254111 is an apocalyptic number.

198254111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

198254111 is a deficient number, since it is larger than the sum of its proper divisors (18023113).

198254111 is a wasteful number, since it uses less digits than its factorization.

198254111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18023112.

The product of its digits is 2880, while the sum is 32.

The square root of 198254111 is about 14080.2738254623. The cubic root of 198254111 is about 583.0969018082.

The spelling of 198254111 in words is "one hundred ninety-eight million, two hundred fifty-four thousand, one hundred eleven".