31233222055081 has 2 divisors, whose sum is σ = 31233222055082. Its totient is φ = 31233222055080.

The previous prime is 31233222055019. The next prime is 31233222055093. The reversal of 31233222055081 is 18055022233213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30146040472681 + 1087181582400 = 5490541^2 + 1042680^2 .

It is a cyclic number.

It is not a de Polignac number, because 31233222055081 - 2³³ = 31224632120489 is a prime.

It is a super-2 number, since 2×31233222055081² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31233222055081.

It is not a weakly prime, because it can be changed into another prime (31233222055181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15616611027540 + 15616611027541.

It is an arithmetic number, because the mean of its divisors is an integer number (15616611027541).

Almost surely, 2^{31233222055081} is an apocalyptic number.

It is an amenable number.

31233222055081 is a deficient number, since it is larger than the sum of its proper divisors (1).

31233222055081 is an equidigital number, since it uses as much as digits as its factorization.

31233222055081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 31233222055081 its reverse (18055022233213), we get a palindrome (49288244288294).

The spelling of 31233222055081 in words is "thirty-one trillion, two hundred thirty-three billion, two hundred twenty-two million, fifty-five thousand, eighty-one".