7197216806 has 8 divisors (see below), whose sum is σ = 11626273344. Its totient is φ = 3321792360.

The previous prime is 7197216799. The next prime is 7197216811. The reversal of 7197216806 is 6086127917.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138407990 + ... + 138408041.

It is an arithmetic number, because the mean of its divisors is an integer number (1453284168).

Almost surely, 2^7197216806 is an apocalyptic number.

7197216806 is a deficient number, since it is larger than the sum of its proper divisors (4429056538).

7197216806 is a wasteful number, since it uses less digits than its factorization.

7197216806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276816046.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 7197216806 is about 84836.4120292696. The cubic root of 7197216806 is about 1930.7299274909.

Subtracting from 7197216806 its reverse (6086127917), we obtain a square (1111088889 = 33333²).

The spelling of 7197216806 in words is "seven billion, one hundred ninety-seven million, two hundred sixteen thousand, eight hundred six".