191116501 has 4 divisors (see below), whose sum is σ = 191500000. Its totient is φ = 190733004.

The previous prime is 191116493. The next prime is 191116511. The reversal of 191116501 is 105611191.

191116501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 191116501 - 2³ = 191116493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191116511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191001 + ... + 191998.

It is an arithmetic number, because the mean of its divisors is an integer number (47875000).

Almost surely, 2^191116501 is an apocalyptic number.

It is an amenable number.

191116501 is a deficient number, since it is larger than the sum of its proper divisors (383499).

191116501 is an equidigital number, since it uses as much as digits as its factorization.

191116501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383498.

The product of its (nonzero) digits is 270, while the sum is 25.

The square root of 191116501 is about 13824.4891768195. The cubic root of 191116501 is about 576.0135881648.

Adding to 191116501 its reverse (105611191), we get a palindrome (296727692).

The spelling of 191116501 in words is "one hundred ninety-one million, one hundred sixteen thousand, five hundred one".