7273131821 has 8 divisors (see below), whose sum is σ = 7535650080. Its totient is φ = 7011394992.

The previous prime is 7273131797. The next prime is 7273131823. The reversal of 7273131821 is 1281313727.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7273131821 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 (7273131823) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 176375 + ... + 213668.

It is an arithmetic number, because the mean of its divisors is an integer number (941956260).

Almost surely, 2^7273131821 is an apocalyptic number.

It is an amenable number.

7273131821 is a deficient number, since it is larger than the sum of its proper divisors (262518259).

7273131821 is a wasteful number, since it uses less digits than its factorization.

7273131821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390715.

The product of its digits is 14112, while the sum is 35.

The square root of 7273131821 is about 85282.6583837535. The cubic root of 7273131821 is about 1937.4945355989.

The spelling of 7273131821 in words is "seven billion, two hundred seventy-three million, one hundred thirty-one thousand, eight hundred twenty-one".