7211722513 has 2 divisors, whose sum is σ = 7211722514. Its totient is φ = 7211722512.

The previous prime is 7211722501. The next prime is 7211722537. The reversal of 7211722513 is 3152271127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6294359569 + 917362944 = 79337^2 + 30288^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7211722513 is a prime.

It is a super-2 number, since 2×7211722513² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7211722313) 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 as a sum of consecutive naturals, namely, 3605861256 + 3605861257.

It is an arithmetic number, because the mean of its divisors is an integer number (3605861257).

Almost surely, 2^7211722513 is an apocalyptic number.

It is an amenable number.

7211722513 is a deficient number, since it is larger than the sum of its proper divisors (1).

7211722513 is an equidigital number, since it uses as much as digits as its factorization.

7211722513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5880, while the sum is 31.

The square root of 7211722513 is about 84921.8612195941. The cubic root of 7211722513 is about 1932.0261604199.

The spelling of 7211722513 in words is "seven billion, two hundred eleven million, seven hundred twenty-two thousand, five hundred thirteen".