221315504535329 has 2 divisors, whose sum is σ = 221315504535330. Its totient is φ = 221315504535328.

The previous prime is 221315504535247. The next prime is 221315504535343. The reversal of 221315504535329 is 923535405513122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151424148924304 + 69891355611025 = 12305452^2 + 8360105^2 .

It is a cyclic number.

It is not a de Polignac number, because 221315504535329 - 2¹⁶ = 221315504469793 is a prime.

It is not a weakly prime, because it can be changed into another prime (221315504535379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110657752267664 + 110657752267665.

It is an arithmetic number, because the mean of its divisors is an integer number (110657752267665).

Almost surely, 2^{221315504535329} is an apocalyptic number.

It is an amenable number.

221315504535329 is a deficient number, since it is larger than the sum of its proper divisors (1).

221315504535329 is an equidigital number, since it uses as much as digits as its factorization.

221315504535329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860000, while the sum is 50.

The spelling of 221315504535329 in words is "two hundred twenty-one trillion, three hundred fifteen billion, five hundred four million, five hundred thirty-five thousand, three hundred twenty-nine".