133312831 has 2 divisors, whose sum is σ = 133312832. Its totient is φ = 133312830.

The previous prime is 133312799. The next prime is 133312847. The reversal of 133312831 is 138213331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133312831 - 2⁵ = 133312799 is a prime.

It is a super-2 number, since 2×133312831² = 35544621818469122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133312796 and 133312805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133312891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66656415 + 66656416.

It is an arithmetic number, because the mean of its divisors is an integer number (66656416).

Almost surely, 2^133312831 is an apocalyptic number.

133312831 is a deficient number, since it is larger than the sum of its proper divisors (1).

133312831 is an equidigital number, since it uses as much as digits as its factorization.

133312831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 133312831 is about 11546.1175725869. The cubic root of 133312831 is about 510.8467683677.

The spelling of 133312831 in words is "one hundred thirty-three million, three hundred twelve thousand, eight hundred thirty-one".