7221173412553 has 2 divisors, whose sum is σ = 7221173412554. Its totient is φ = 7221173412552.

The previous prime is 7221173412539. The next prime is 7221173412581. The reversal of 7221173412553 is 3552143711227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6835939680969 + 385233731584 = 2614563^2 + 620672^2 .

It is a cyclic number.

It is not a de Polignac number, because 7221173412553 - 2⁵ = 7221173412521 is a prime.

It is not a weakly prime, because it can be changed into another prime (7221173412533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610586706276 + 3610586706277.

It is an arithmetic number, because the mean of its divisors is an integer number (3610586706277).

Almost surely, 2^{7221173412553} is an apocalyptic number.

It is an amenable number.

7221173412553 is a deficient number, since it is larger than the sum of its proper divisors (1).

7221173412553 is an equidigital number, since it uses as much as digits as its factorization.

7221173412553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 352800, while the sum is 43.

The spelling of 7221173412553 in words is "seven trillion, two hundred twenty-one billion, one hundred seventy-three million, four hundred twelve thousand, five hundred fifty-three".