7216747 has 4 divisors (see below), whose sum is σ = 7228816. Its totient is φ = 7204680.

The previous prime is 7216723. The next prime is 7216757. The reversal of 7216747 is 7476127.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7216747 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7216717) 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, 5088 + ... + 6349.

It is an arithmetic number, because the mean of its divisors is an integer number (1807204).

Almost surely, 2^7216747 is an apocalyptic number.

7216747 is a deficient number, since it is larger than the sum of its proper divisors (12069).

7216747 is a wasteful number, since it uses less digits than its factorization.

7216747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12068.

The product of its digits is 16464, while the sum is 34.

The square root of 7216747 is about 2686.4003796903. The cubic root of 7216747 is about 193.2474744271.

The spelling of 7216747 in words is "seven million, two hundred sixteen thousand, seven hundred forty-seven".