199493251 has 8 divisors (see below), whose sum is σ = 202857984. Its totient is φ = 196156800.

The previous prime is 199493243. The next prime is 199493257. The reversal of 199493251 is 152394991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199493251 - 2³ = 199493243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199493198 and 199493207.

It is not an unprimeable number, because it can be changed into a prime (199493257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7401 + ... + 21301.

It is an arithmetic number, because the mean of its divisors is an integer number (25357248).

Almost surely, 2^199493251 is an apocalyptic number.

199493251 is a deficient number, since it is larger than the sum of its proper divisors (3364733).

199493251 is a wasteful number, since it uses less digits than its factorization.

199493251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14141.

The product of its digits is 87480, while the sum is 43.

The square root of 199493251 is about 14124.2079777947. The cubic root of 199493251 is about 584.3092155484.

The spelling of 199493251 in words is "one hundred ninety-nine million, four hundred ninety-three thousand, two hundred fifty-one".