7313272981 has 24 divisors (see below), whose sum is σ = 8705302200. Its totient is φ = 6124003200.

The previous prime is 7313272979. The next prime is 7313272997. The reversal of 7313272981 is 1892723137.

It can be written as a sum of positive squares in 4 ways, for example, as 1502260081 + 5811012900 = 38759^2 + 76230^2 .

It is not a de Polignac number, because 7313272981 - 2¹ = 7313272979 is a prime.

It is a super-2 number, since 2×7313272981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7313272931) 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 23 ways as a sum of consecutive naturals, for example, 437151 + ... + 453571.

It is an arithmetic number, because the mean of its divisors is an integer number (362720925).

Almost surely, 2^7313272981 is an apocalyptic number.

It is an amenable number.

7313272981 is a deficient number, since it is larger than the sum of its proper divisors (1392029219).

7313272981 is a wasteful number, since it uses less digits than its factorization.

7313272981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16645 (or 16638 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 7313272981 is about 85517.6764242341. The cubic root of 7313272981 is about 1941.0524084931.

The spelling of 7313272981 in words is "seven billion, three hundred thirteen million, two hundred seventy-two thousand, nine hundred eighty-one".