2145520931329 has 2 divisors, whose sum is σ = 2145520931330. Its totient is φ = 2145520931328.

The previous prime is 2145520931317. The next prime is 2145520931347. The reversal of 2145520931329 is 9231390255412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2060522444304 + 84998487025 = 1435452^2 + 291545^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145520931329 - 2¹¹ = 2145520929281 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145520931369) 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, 1072760465664 + 1072760465665.

It is an arithmetic number, because the mean of its divisors is an integer number (1072760465665).

Almost surely, 2^{2145520931329} is an apocalyptic number.

It is an amenable number.

2145520931329 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145520931329 is an equidigital number, since it uses as much as digits as its factorization.

2145520931329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 583200, while the sum is 46.

The spelling of 2145520931329 in words is "two trillion, one hundred forty-five billion, five hundred twenty million, nine hundred thirty-one thousand, three hundred twenty-nine".