133355298581 has 2 divisors, whose sum is σ = 133355298582. Its totient is φ = 133355298580.

The previous prime is 133355298553. The next prime is 133355298599. The reversal of 133355298581 is 185892553331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128928392356 + 4426906225 = 359066^2 + 66535^2 .

It is a cyclic number.

It is not a de Polignac number, because 133355298581 - 2¹⁰ = 133355297557 is a prime.

It is a super-2 number, since 2×133355298581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133355298551) 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, 66677649290 + 66677649291.

It is an arithmetic number, because the mean of its divisors is an integer number (66677649291).

Almost surely, 2^133355298581 is an apocalyptic number.

It is an amenable number.

133355298581 is a deficient number, since it is larger than the sum of its proper divisors (1).

133355298581 is an equidigital number, since it uses as much as digits as its factorization.

133355298581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888000, while the sum is 53.

The spelling of 133355298581 in words is "one hundred thirty-three billion, three hundred fifty-five million, two hundred ninety-eight thousand, five hundred eighty-one".