7220541218 has 8 divisors (see below), whose sum is σ = 11815431120. Its totient is φ = 3282064180.

The previous prime is 7220541199. The next prime is 7220541281. The reversal of 7220541218 is 8121450227.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164103188 + ... + 164103231.

It is an arithmetic number, because the mean of its divisors is an integer number (1476928890).

Almost surely, 2^7220541218 is an apocalyptic number.

7220541218 is a deficient number, since it is larger than the sum of its proper divisors (4594889902).

7220541218 is a wasteful number, since it uses less digits than its factorization.

7220541218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328206432.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 7220541218 is about 84973.7678227816. The cubic root of 7220541218 is about 1932.8133523195.

Subtracting 7220541218 from its reverse (8121450227), we obtain a palindrome (900909009).

The spelling of 7220541218 in words is "seven billion, two hundred twenty million, five hundred forty-one thousand, two hundred eighteen".