7218116851 has 16 divisors (see below), whose sum is σ = 7927815168. Its totient is φ = 6517476000.

The previous prime is 7218116837. The next prime is 7218116879. The reversal of 7218116851 is 1586118127.

7218116851 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 7218116851 - 2⁷ = 7218116723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7218116821) 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, 1142401 + ... + 1148701.

It is an arithmetic number, because the mean of its divisors is an integer number (495488448).

Almost surely, 2^7218116851 is an apocalyptic number.

7218116851 is a deficient number, since it is larger than the sum of its proper divisors (709698317).

7218116851 is a wasteful number, since it uses less digits than its factorization.

7218116851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7002.

The product of its digits is 26880, while the sum is 40.

The square root of 7218116851 is about 84959.5012402968. The cubic root of 7218116851 is about 1932.5970078053.

The spelling of 7218116851 in words is "seven billion, two hundred eighteen million, one hundred sixteen thousand, eight hundred fifty-one".