331573223281 has 2 divisors, whose sum is σ = 331573223282. Its totient is φ = 331573223280.

The previous prime is 331573223239. The next prime is 331573223321. The reversal of 331573223281 is 182322375133.

It is a happy number.

It is an a-pointer prime, because the next prime (331573223321) can be obtained adding 331573223281 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292663688256 + 38909535025 = 540984^2 + 197255^2 .

It is a cyclic number.

It is not a de Polignac number, because 331573223281 - 2¹⁹ = 331572698993 is a prime.

It is a super-2 number, since 2×331573223281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (331573223081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165786611640 + 165786611641.

It is an arithmetic number, because the mean of its divisors is an integer number (165786611641).

Almost surely, 2^331573223281 is an apocalyptic number.

It is an amenable number.

331573223281 is a deficient number, since it is larger than the sum of its proper divisors (1).

331573223281 is an equidigital number, since it uses as much as digits as its factorization.

331573223281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 40.

The spelling of 331573223281 in words is "three hundred thirty-one billion, five hundred seventy-three million, two hundred twenty-three thousand, two hundred eighty-one".