191210065 has 8 divisors (see below), whose sum is σ = 229788288. Its totient is φ = 152743920.

The previous prime is 191210039. The next prime is 191210081. The reversal of 191210065 is 560012191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-191210065 is a prime.

It is a super-2 number, since 2×191210065² = 73122577914608450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24217 + ... + 31126.

It is an arithmetic number, because the mean of its divisors is an integer number (28723536).

Almost surely, 2^191210065 is an apocalyptic number.

It is an amenable number.

191210065 is a deficient number, since it is larger than the sum of its proper divisors (38578223).

191210065 is an equidigital number, since it uses as much as digits as its factorization.

191210065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56039.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 191210065 is about 13827.8727575864. The cubic root of 191210065 is about 576.1075715774.

The spelling of 191210065 in words is "one hundred ninety-one million, two hundred ten thousand, sixty-five".