199910231 has 8 divisors (see below), whose sum is σ = 205752960. Its totient is φ = 194149432.

The previous prime is 199910213. The next prime is 199910239. The reversal of 199910231 is 132019991.

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 199910231 - 2⁶ = 199910167 is a prime.

It is a super-2 number, since 2×199910231² = 79928200916946722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199910191 and 199910200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199910239) 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 7 ways as a sum of consecutive naturals, for example, 15515 + ... + 25308.

It is an arithmetic number, because the mean of its divisors is an integer number (25719120).

Almost surely, 2^199910231 is an apocalyptic number.

199910231 is a deficient number, since it is larger than the sum of its proper divisors (5842729).

199910231 is an equidigital number, since it uses as much as digits as its factorization.

199910231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40965.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 199910231 is about 14138.9614540814. The cubic root of 199910231 is about 584.7160391659.

The spelling of 199910231 in words is "one hundred ninety-nine million, nine hundred ten thousand, two hundred thirty-one".