199248281 has 4 divisors (see below), whose sum is σ = 199460964. Its totient is φ = 199035600.

The previous prime is 199248271. The next prime is 199248311. The reversal of 199248281 is 182842991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 154157056 + 45091225 = 12416^2 + 6715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199248281 is a prime.

It is a super-2 number, since 2×199248281² = 79399754962909922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199248221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104930 + ... + 106811.

It is an arithmetic number, because the mean of its divisors is an integer number (49865241).

Almost surely, 2^199248281 is an apocalyptic number.

It is an amenable number.

199248281 is a deficient number, since it is larger than the sum of its proper divisors (212683).

199248281 is an equidigital number, since it uses as much as digits as its factorization.

199248281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212682.

The product of its digits is 82944, while the sum is 44.

The square root of 199248281 is about 14115.5333232578. The cubic root of 199248281 is about 584.0699478753.

The spelling of 199248281 in words is "one hundred ninety-nine million, two hundred forty-eight thousand, two hundred eighty-one".