7216697191 has 4 divisors (see below), whose sum is σ = 7872760584. Its totient is φ = 6560633800.

The previous prime is 7216697167. The next prime is 7216697219. The reversal of 7216697191 is 1917966127.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7216697191 - 2⁷ = 7216697063 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 (7216697101) 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, 328031680 + ... + 328031701.

It is an arithmetic number, because the mean of its divisors is an integer number (1968190146).

Almost surely, 2^7216697191 is an apocalyptic number.

7216697191 is a deficient number, since it is larger than the sum of its proper divisors (656063393).

7216697191 is a wasteful number, since it uses less digits than its factorization.

7216697191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656063392.

The product of its digits is 285768, while the sum is 49.

The square root of 7216697191 is about 84951.1459075156. The cubic root of 7216697191 is about 1932.4702983686.

It can be divided in two parts, 7216 and 697191, that added together give a palindrome (704407).

The spelling of 7216697191 in words is "seven billion, two hundred sixteen million, six hundred ninety-seven thousand, one hundred ninety-one".