320216521253 has 2 divisors, whose sum is σ = 320216521254. Its totient is φ = 320216521252.

The previous prime is 320216521241. The next prime is 320216521259. The reversal of 320216521253 is 352125612023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 304436890564 + 15779630689 = 551758^2 + 125617^2 .

It is a cyclic number.

It is not a de Polignac number, because 320216521253 - 2¹⁰ = 320216520229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320216521259) 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, 160108260626 + 160108260627.

It is an arithmetic number, because the mean of its divisors is an integer number (160108260627).

Almost surely, 2^320216521253 is an apocalyptic number.

It is an amenable number.

320216521253 is a deficient number, since it is larger than the sum of its proper divisors (1).

320216521253 is an equidigital number, since it uses as much as digits as its factorization.

320216521253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 320216521253 in words is "three hundred twenty billion, two hundred sixteen million, five hundred twenty-one thousand, two hundred fifty-three".