7220975081 has 2 divisors, whose sum is σ = 7220975082. Its totient is φ = 7220975080.

The previous prime is 7220975059. The next prime is 7220975119. The reversal of 7220975081 is 1805790227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7109862400 + 111112681 = 84320^2 + 10541^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7220975081 is a prime.

It is a super-2 number, since 2×7220975081² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7220972081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610487540 + 3610487541.

It is an arithmetic number, because the mean of its divisors is an integer number (3610487541).

Almost surely, 2^7220975081 is an apocalyptic number.

It is an amenable number.

7220975081 is a deficient number, since it is larger than the sum of its proper divisors (1).

7220975081 is an equidigital number, since it uses as much as digits as its factorization.

7220975081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 7220975081 is about 84976.3207075948. The cubic root of 7220975081 is about 1932.8520640715.

The spelling of 7220975081 in words is "seven billion, two hundred twenty million, nine hundred seventy-five thousand, eighty-one".