5322720311581 has 2 divisors, whose sum is σ = 5322720311582. Its totient is φ = 5322720311580.

The previous prime is 5322720311509. The next prime is 5322720311593. The reversal of 5322720311581 is 1851130272235.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5311485371556 + 11234940025 = 2304666^2 + 105995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5322720311581 is a prime.

It is a super-2 number, since 2×5322720311581² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5322720311501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2661360155790 + 2661360155791.

It is an arithmetic number, because the mean of its divisors is an integer number (2661360155791).

Almost surely, 2^{5322720311581} is an apocalyptic number.

It is an amenable number.

5322720311581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5322720311581 is an equidigital number, since it uses as much as digits as its factorization.

5322720311581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 5322720311581 in words is "five trillion, three hundred twenty-two billion, seven hundred twenty million, three hundred eleven thousand, five hundred eighty-one".