198266143 has 4 divisors (see below), whose sum is σ = 198303040. Its totient is φ = 198229248.

The previous prime is 198266099. The next prime is 198266147. The reversal of 198266143 is 341662891.

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 198266143 - 2¹⁷ = 198135071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198266096 and 198266105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198266147) 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, 8655 + ... + 21712.

It is an arithmetic number, because the mean of its divisors is an integer number (49575760).

Almost surely, 2^198266143 is an apocalyptic number.

198266143 is a deficient number, since it is larger than the sum of its proper divisors (36897).

198266143 is an equidigital number, since it uses as much as digits as its factorization.

198266143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36896.

The product of its digits is 62208, while the sum is 40.

The square root of 198266143 is about 14080.7010833978. The cubic root of 198266143 is about 583.1086975787.

The spelling of 198266143 in words is "one hundred ninety-eight million, two hundred sixty-six thousand, one hundred forty-three".