7273218241 has 4 divisors (see below), whose sum is σ = 7524018900. Its totient is φ = 7022417584.

The previous prime is 7273218223. The next prime is 7273218269. The reversal of 7273218241 is 1428123727.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2946209841 + 4327008400 = 54279^2 + 65780^2 .

It is a cyclic number.

It is not a de Polignac number, because 7273218241 - 2⁵ = 7273218209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7273218241.

It is not an unprimeable number, because it can be changed into a prime (7273218541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125400286 + ... + 125400343.

It is an arithmetic number, because the mean of its divisors is an integer number (1881004725).

Almost surely, 2^7273218241 is an apocalyptic number.

It is an amenable number.

7273218241 is a deficient number, since it is larger than the sum of its proper divisors (250800659).

7273218241 is a wasteful number, since it uses less digits than its factorization.

7273218241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250800658.

The product of its digits is 37632, while the sum is 37.

The square root of 7273218241 is about 85283.1650503193. The cubic root of 7273218241 is about 1937.5022093960.

The spelling of 7273218241 in words is "seven billion, two hundred seventy-three million, two hundred eighteen thousand, two hundred forty-one".