199996143 has 16 divisors (see below), whose sum is σ = 284945760. Its totient is φ = 124333056.

The previous prime is 199996141. The next prime is 199996157. The reversal of 199996143 is 341699991.

It is not a de Polignac number, because 199996143 - 2¹ = 199996141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199996141) 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, 12430 + ... + 23547.

It is an arithmetic number, because the mean of its divisors is an integer number (17809110).

Almost surely, 2^199996143 is an apocalyptic number.

199996143 is a deficient number, since it is larger than the sum of its proper divisors (84949617).

199996143 is a wasteful number, since it uses less digits than its factorization.

199996143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36106.

The product of its digits is 472392, while the sum is 51.

The square root of 199996143 is about 14141.9992575307. Note that the first 3 decimals coincide. The cubic root of 199996143 is about 584.7997883063.

The spelling of 199996143 in words is "one hundred ninety-nine million, nine hundred ninety-six thousand, one hundred forty-three".