133185621086831 has 2 divisors, whose sum is σ = 133185621086832. Its totient is φ = 133185621086830.

The previous prime is 133185621086827. The next prime is 133185621086909. The reversal of 133185621086831 is 138680126581331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133185621086831 - 2² = 133185621086827 is a prime.

It is a super-2 number, since 2×133185621086831² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133185621086731) 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, 66592810543415 + 66592810543416.

It is an arithmetic number, because the mean of its divisors is an integer number (66592810543416).

Almost surely, 2^{133185621086831} is an apocalyptic number.

133185621086831 is a deficient number, since it is larger than the sum of its proper divisors (1).

133185621086831 is an equidigital number, since it uses as much as digits as its factorization.

133185621086831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4976640, while the sum is 56.

The spelling of 133185621086831 in words is "one hundred thirty-three trillion, one hundred eighty-five billion, six hundred twenty-one million, eighty-six thousand, eight hundred thirty-one".