199144231 has 16 divisors (see below), whose sum is σ = 234436608. Its totient is φ = 166773600.

The previous prime is 199144213. The next prime is 199144237. The reversal of 199144231 is 132441991.

It is a cyclic number.

It is not a de Polignac number, because 199144231 - 2²⁵ = 165589799 is a prime.

It is a super-2 number, since 2×199144231² = 79316849481162722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199144237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89130 + ... + 91336.

It is an arithmetic number, because the mean of its divisors is an integer number (14652288).

Almost surely, 2^199144231 is an apocalyptic number.

199144231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

199144231 is a deficient number, since it is larger than the sum of its proper divisors (35292377).

199144231 is a wasteful number, since it uses less digits than its factorization.

199144231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2862.

The product of its digits is 7776, while the sum is 34.

The square root of 199144231 is about 14111.8471859640. The cubic root of 199144231 is about 583.9682605741.

The spelling of 199144231 in words is "one hundred ninety-nine million, one hundred forty-four thousand, two hundred thirty-one".