16530312191 has 2 divisors, whose sum is σ = 16530312192. Its totient is φ = 16530312190.

The previous prime is 16530312179. The next prime is 16530312251. The reversal of 16530312191 is 19121303561.

It is a weak prime.

It is an emirp because it is prime and its reverse (19121303561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16530312191 - 2¹⁰ = 16530311167 is a prime.

It is a super-2 number, since 2×16530312191² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16530312791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8265156095 + 8265156096.

It is an arithmetic number, because the mean of its divisors is an integer number (8265156096).

Almost surely, 2^16530312191 is an apocalyptic number.

16530312191 is a deficient number, since it is larger than the sum of its proper divisors (1).

16530312191 is an equidigital number, since it uses as much as digits as its factorization.

16530312191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The spelling of 16530312191 in words is "sixteen billion, five hundred thirty million, three hundred twelve thousand, one hundred ninety-one".