331345621297 has 2 divisors, whose sum is σ = 331345621298. Its totient is φ = 331345621296.

The previous prime is 331345621253. The next prime is 331345621307. The reversal of 331345621297 is 792126543133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331132344481 + 213276816 = 575441^2 + 14604^2 .

It is an emirp because it is prime and its reverse (792126543133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331345621297 - 2¹¹ = 331345619249 is a prime.

It is not a weakly prime, because it can be changed into another prime (331345621097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165672810648 + 165672810649.

It is an arithmetic number, because the mean of its divisors is an integer number (165672810649).

Almost surely, 2^331345621297 is an apocalyptic number.

It is an amenable number.

331345621297 is a deficient number, since it is larger than the sum of its proper divisors (1).

331345621297 is an equidigital number, since it uses as much as digits as its factorization.

331345621297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 46.

The spelling of 331345621297 in words is "three hundred thirty-one billion, three hundred forty-five million, six hundred twenty-one thousand, two hundred ninety-seven".