7197995281 has 9 divisors (see below), whose sum is σ = 7401021201. Its totient is φ = 7000400592.

The previous prime is 7197995269. The next prime is 7197995297. The reversal of 7197995281 is 1825997917.

The square root of 7197995281 is 84841.

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

It can be written as a sum of positive squares in 4 ways, for example, as 401641681 + 6796353600 = 20041^2 + 82440^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7197995281 is a prime.

It is a super-2 number, since 2×7197995281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7197995201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3137971 + ... + 3140263.

It is an arithmetic number, because the mean of its divisors is an integer number (822335689).

Almost surely, 2^7197995281 is an apocalyptic number.

7197995281 is the 84841-st square number.

7197995281 is the 42421-st centered octagonal number.

It is an amenable number.

7197995281 is a deficient number, since it is larger than the sum of its proper divisors (203025920).

7197995281 is an frugal number, since it uses more digits than its factorization.

7197995281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4660 (or 2330 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 58.

The cubic root of 7197995281 is about 1930.7995363797.

The spelling of 7197995281 in words is "seven billion, one hundred ninety-seven million, nine hundred ninety-five thousand, two hundred eighty-one".