7218195133 has 16 divisors (see below), whose sum is σ = 8078071680. Its totient is φ = 6417537984.

The previous prime is 7218195113. The next prime is 7218195137. The reversal of 7218195133 is 3315918127.

It is a cyclic number.

It is not a de Polignac number, because 7218195133 - 2²¹ = 7216097981 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 (7218195137) 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, 132666 + ... + 178987.

It is an arithmetic number, because the mean of its divisors is an integer number (504879480).

Almost surely, 2^7218195133 is an apocalyptic number.

It is an amenable number.

7218195133 is a deficient number, since it is larger than the sum of its proper divisors (859876547).

7218195133 is a wasteful number, since it uses less digits than its factorization.

7218195133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311748.

The product of its digits is 45360, while the sum is 40.

The square root of 7218195133 is about 84959.9619409048. The cubic root of 7218195133 is about 1932.6039942541.

The spelling of 7218195133 in words is "seven billion, two hundred eighteen million, one hundred ninety-five thousand, one hundred thirty-three".