198182281 has 4 divisors (see below), whose sum is σ = 216198864. Its totient is φ = 180165700.

The previous prime is 198182279. The next prime is 198182291. The reversal of 198182281 is 182281891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 198182281 - 2¹ = 198182279 is a prime.

It is a super-2 number, since 2×198182281² = 78552433004725922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198182261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9008275 + ... + 9008296.

It is an arithmetic number, because the mean of its divisors is an integer number (54049716).

Almost surely, 2^198182281 is an apocalyptic number.

198182281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

198182281 is a deficient number, since it is larger than the sum of its proper divisors (18016583).

198182281 is a wasteful number, since it uses less digits than its factorization.

198182281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18016582.

The product of its digits is 18432, while the sum is 40.

The square root of 198182281 is about 14077.7228627360. The cubic root of 198182281 is about 583.0264721466.

The spelling of 198182281 in words is "one hundred ninety-eight million, one hundred eighty-two thousand, two hundred eighty-one".