133502431 has 2 divisors, whose sum is σ = 133502432. Its totient is φ = 133502430.

The previous prime is 133502423. The next prime is 133502449. The reversal of 133502431 is 134205331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133502431 - 2³ = 133502423 is a prime.

It is a super-2 number, since 2×133502431² = 35645798165819522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133502491) 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, 66751215 + 66751216.

It is an arithmetic number, because the mean of its divisors is an integer number (66751216).

Almost surely, 2^133502431 is an apocalyptic number.

133502431 is a deficient number, since it is larger than the sum of its proper divisors (1).

133502431 is an equidigital number, since it uses as much as digits as its factorization.

133502431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 133502431 is about 11554.3252074710. The cubic root of 133502431 is about 511.0888322555.

Adding to 133502431 its reverse (134205331), we get a palindrome (267707762).

The spelling of 133502431 in words is "one hundred thirty-three million, five hundred two thousand, four hundred thirty-one".