321273134549 has 2 divisors, whose sum is σ = 321273134550. Its totient is φ = 321273134548.

The previous prime is 321273134503. The next prime is 321273134561. The reversal of 321273134549 is 945431372123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171825172324 + 149447962225 = 414518^2 + 386585^2 .

It is a cyclic number.

It is not a de Polignac number, because 321273134549 - 2⁸ = 321273134293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321273134249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160636567274 + 160636567275.

It is an arithmetic number, because the mean of its divisors is an integer number (160636567275).

Almost surely, 2^321273134549 is an apocalyptic number.

It is an amenable number.

321273134549 is a deficient number, since it is larger than the sum of its proper divisors (1).

321273134549 is an equidigital number, since it uses as much as digits as its factorization.

321273134549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 44.

The spelling of 321273134549 in words is "three hundred twenty-one billion, two hundred seventy-three million, one hundred thirty-four thousand, five hundred forty-nine".