71322054521 has 2 divisors, whose sum is σ = 71322054522. Its totient is φ = 71322054520.

The previous prime is 71322054469. The next prime is 71322054563. The reversal of 71322054521 is 12545022317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67256716921 + 4065337600 = 259339^2 + 63760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71322054521 is a prime.

It is a super-2 number, since 2×71322054521² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71322054421) 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, 35661027260 + 35661027261.

It is an arithmetic number, because the mean of its divisors is an integer number (35661027261).

Almost surely, 2^71322054521 is an apocalyptic number.

It is an amenable number.

71322054521 is a deficient number, since it is larger than the sum of its proper divisors (1).

71322054521 is an equidigital number, since it uses as much as digits as its factorization.

71322054521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 32.

Adding to 71322054521 its reverse (12545022317), we get a palindrome (83867076838).

The spelling of 71322054521 in words is "seventy-one billion, three hundred twenty-two million, fifty-four thousand, five hundred twenty-one".