7216717387 has 16 divisors (see below), whose sum is σ = 8122913280. Its totient is φ = 6355346400.

The previous prime is 7216717373. The next prime is 7216717393. The reversal of 7216717387 is 7837176127.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7216717387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7216717387.

It is not an unprimeable number, because it can be changed into a prime (7216717357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32289 + ... + 124402.

It is an arithmetic number, because the mean of its divisors is an integer number (507682080).

Almost surely, 2^7216717387 is an apocalyptic number.

7216717387 is a deficient number, since it is larger than the sum of its proper divisors (906195893).

7216717387 is a wasteful number, since it uses less digits than its factorization.

7216717387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156834.

The product of its digits is 691488, while the sum is 49.

The square root of 7216717387 is about 84951.2647757525. The cubic root of 7216717387 is about 1932.4721010461.

The spelling of 7216717387 in words is "seven billion, two hundred sixteen million, seven hundred seventeen thousand, three hundred eighty-seven".