2231728321297 has 2 divisors, whose sum is σ = 2231728321298. Its totient is φ = 2231728321296.

The previous prime is 2231728321271. The next prime is 2231728321337. The reversal of 2231728321297 is 7921238271322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1983700416721 + 248027904576 = 1408439^2 + 498024^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231728321297 - 2²⁷ = 2231594103569 is a prime.

It is a super-3 number, since 3×2231728321297³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 2231728321297.

It is not a weakly prime, because it can be changed into another prime (2231728321397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115864160648 + 1115864160649.

It is an arithmetic number, because the mean of its divisors is an integer number (1115864160649).

Almost surely, 2^{2231728321297} is an apocalyptic number.

It is an amenable number.

2231728321297 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231728321297 is an equidigital number, since it uses as much as digits as its factorization.

2231728321297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 49.

The spelling of 2231728321297 in words is "two trillion, two hundred thirty-one billion, seven hundred twenty-eight million, three hundred twenty-one thousand, two hundred ninety-seven".