191143104 has 112 divisors (see below), whose sum is σ = 540337248. Its totient is φ = 59424768.

The previous prime is 191143093. The next prime is 191143111. The reversal of 191143104 is 401341191.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 512262 + ... + 512634.

Almost surely, 2^191143104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191143104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270168624).

191143104 is an abundant number, since it is smaller than the sum of its proper divisors (349194144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191143104 is a wasteful number, since it uses less digits than its factorization.

191143104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 552 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 191143104 is about 13825.4513127059. The cubic root of 191143104 is about 576.0403135365.

Adding to 191143104 its reverse (401341191), we get a palindrome (592484295).

The spelling of 191143104 in words is "one hundred ninety-one million, one hundred forty-three thousand, one hundred four".