7217543379 has 4 divisors (see below), whose sum is σ = 9623391176. Its totient is φ = 4811695584.

The previous prime is 7217543369. The next prime is 7217543393. The reversal of 7217543379 is 9733457127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9733457127 = 3 ⋅3244485709.

It is not a de Polignac number, because 7217543379 - 2⁷ = 7217543251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7217543369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1202923894 + ... + 1202923899.

It is an arithmetic number, because the mean of its divisors is an integer number (2405847794).

Almost surely, 2^7217543379 is an apocalyptic number.

7217543379 is a deficient number, since it is larger than the sum of its proper divisors (2405847797).

7217543379 is a wasteful number, since it uses less digits than its factorization.

7217543379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2405847796.

The product of its digits is 1111320, while the sum is 48.

The square root of 7217543379 is about 84956.1262005278. The cubic root of 7217543379 is about 1932.5458254980.

The spelling of 7217543379 in words is "seven billion, two hundred seventeen million, five hundred forty-three thousand, three hundred seventy-nine".