320231156412229 has 2 divisors, whose sum is σ = 320231156412230. Its totient is φ = 320231156412228.

The previous prime is 320231156412203. The next prime is 320231156412247. The reversal of 320231156412229 is 922214651132023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175292913071329 + 144938243340900 = 13239823^2 + 12039030^2 .

It is an emirp because it is prime and its reverse (922214651132023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320231156412229 - 2²⁵ = 320231122857797 is a prime.

It is a super-2 number, since 2×320231156412229² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320231156412269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160115578206114 + 160115578206115.

It is an arithmetic number, because the mean of its divisors is an integer number (160115578206115).

Almost surely, 2^{320231156412229} is an apocalyptic number.

It is an amenable number.

320231156412229 is a deficient number, since it is larger than the sum of its proper divisors (1).

320231156412229 is an equidigital number, since it uses as much as digits as its factorization.

320231156412229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 320231156412229 in words is "three hundred twenty trillion, two hundred thirty-one billion, one hundred fifty-six million, four hundred twelve thousand, two hundred twenty-nine".