321353553197 has 2 divisors, whose sum is σ = 321353553198. Its totient is φ = 321353553196.

The previous prime is 321353553121. The next prime is 321353553259. The reversal of 321353553197 is 791355353123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 266043450436 + 55310102761 = 515794^2 + 235181^2 .

It is a cyclic number.

It is not a de Polignac number, because 321353553197 - 2³⁸ = 46475646253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321353553107) 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, 160676776598 + 160676776599.

It is an arithmetic number, because the mean of its divisors is an integer number (160676776599).

Almost surely, 2^321353553197 is an apocalyptic number.

It is an amenable number.

321353553197 is a deficient number, since it is larger than the sum of its proper divisors (1).

321353553197 is an equidigital number, since it uses as much as digits as its factorization.

321353553197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1275750, while the sum is 47.

The spelling of 321353553197 in words is "three hundred twenty-one billion, three hundred fifty-three million, five hundred fifty-three thousand, one hundred ninety-seven".