321144424515389 has 2 divisors, whose sum is σ = 321144424515390. Its totient is φ = 321144424515388.

The previous prime is 321144424515269. The next prime is 321144424515427. The reversal of 321144424515389 is 983515424441123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 295313329810489 + 25831094704900 = 17184683^2 + 5082430^2 .

It is a cyclic number.

It is not a de Polignac number, because 321144424515389 - 2²⁰ = 321144423466813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321144424545389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160572212257694 + 160572212257695.

It is an arithmetic number, because the mean of its divisors is an integer number (160572212257695).

Almost surely, 2^{321144424515389} is an apocalyptic number.

It is an amenable number.

321144424515389 is a deficient number, since it is larger than the sum of its proper divisors (1).

321144424515389 is an equidigital number, since it uses as much as digits as its factorization.

321144424515389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16588800, while the sum is 56.

The spelling of 321144424515389 in words is "three hundred twenty-one trillion, one hundred forty-four billion, four hundred twenty-four million, five hundred fifteen thousand, three hundred eighty-nine".