198274231 has 4 divisors (see below), whose sum is σ = 203633032. Its totient is φ = 192915432.

The previous prime is 198274199. The next prime is 198274243. The reversal of 198274231 is 132472891.

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 198274231 - 2⁵ = 198274199 is a prime.

It is a super-2 number, since 2×198274231² = 78625341357282722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 5358763 = 198274231 / (1 + 9 + 8 + 2 + 7 + 4 + 2 + 3 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198274261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2679345 + ... + 2679418.

It is an arithmetic number, because the mean of its divisors is an integer number (50908258).

Almost surely, 2^198274231 is an apocalyptic number.

198274231 is a deficient number, since it is larger than the sum of its proper divisors (5358801).

198274231 is an equidigital number, since it uses as much as digits as its factorization.

198274231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5358800.

The product of its digits is 24192, while the sum is 37.

The square root of 198274231 is about 14080.9882820774. The cubic root of 198274231 is about 583.1166265153.

The spelling of 198274231 in words is "one hundred ninety-eight million, two hundred seventy-four thousand, two hundred thirty-one".