231550441331281 has 2 divisors, whose sum is σ = 231550441331282. Its totient is φ = 231550441331280.

The previous prime is 231550441331233. The next prime is 231550441331309. The reversal of 231550441331281 is 182133144055132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196562222604225 + 34988218727056 = 14020065^2 + 5915084^2 .

It is a cyclic number.

It is not a de Polignac number, because 231550441331281 - 2³³ = 231541851396689 is a prime.

It is a super-2 number, since 2×231550441331281² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231550441331381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115775220665640 + 115775220665641.

It is an arithmetic number, because the mean of its divisors is an integer number (115775220665641).

Almost surely, 2^{231550441331281} is an apocalyptic number.

It is an amenable number.

231550441331281 is a deficient number, since it is larger than the sum of its proper divisors (1).

231550441331281 is an equidigital number, since it uses as much as digits as its factorization.

231550441331281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 231550441331281 in words is "two hundred thirty-one trillion, five hundred fifty billion, four hundred forty-one million, three hundred thirty-one thousand, two hundred eighty-one".