133533131 has 2 divisors, whose sum is σ = 133533132. Its totient is φ = 133533130.

The previous prime is 133533109. The next prime is 133533149. The reversal of 133533131 is 131335331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133533131 - 2¹⁰ = 133532107 is a prime.

It is a super-2 number, since 2×133533131² = 35662194149326322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 133533097 and 133533106.

It is not a weakly prime, because it can be changed into another prime (133533161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66766565 + 66766566.

It is an arithmetic number, because the mean of its divisors is an integer number (66766566).

Almost surely, 2^133533131 is an apocalyptic number.

133533131 is a deficient number, since it is larger than the sum of its proper divisors (1).

133533131 is an equidigital number, since it uses as much as digits as its factorization.

133533131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1215, while the sum is 23.

The square root of 133533131 is about 11555.6536379384. The cubic root of 133533131 is about 511.1280056360.

Adding to 133533131 its reverse (131335331), we get a palindrome (264868462).

The spelling of 133533131 in words is "one hundred thirty-three million, five hundred thirty-three thousand, one hundred thirty-one".