7215313249 has 9 divisors (see below), whose sum is σ = 7272072019. Its totient is φ = 7158996040.

The previous prime is 7215313169. The next prime is 7215313277. The reversal of 7215313249 is 9423135127.

The square root of 7215313249 is 84943.

It is a perfect power (a square), and thus also a powerful number.

7215313249 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6563430225 + 651883024 = 81015^2 + 25532^2 .

It is not a de Polignac number, because 7215313249 - 2²⁷ = 7081095521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7215313849) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14694894 + ... + 14695384.

Almost surely, 2^7215313249 is an apocalyptic number.

7215313249 is the 84943-rd square number.

7215313249 is the 42472-nd centered octagonal number.

It is an amenable number.

7215313249 is a deficient number, since it is larger than the sum of its proper divisors (56758770).

7215313249 is an frugal number, since it uses more digits than its factorization.

7215313249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328 (or 664 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The cubic root of 7215313249 is about 1932.3467608872.

The spelling of 7215313249 in words is "seven billion, two hundred fifteen million, three hundred thirteen thousand, two hundred forty-nine".