133636331 has 4 divisors (see below), whose sum is σ = 133777512. Its totient is φ = 133495152.

The previous prime is 133636309. The next prime is 133636351.

133636331 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133636331 - 2¹⁴ = 133619947 is a prime.

It is a super-3 number, since 3×133636331³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133636294 and 133636303.

It is not an unprimeable number, because it can be changed into a prime (133636351) 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 in 3 ways as a sum of consecutive naturals, for example, 69161 + ... + 71066.

It is an arithmetic number, because the mean of its divisors is an integer number (33444378).

Almost surely, 2^133636331 is an apocalyptic number.

133636331 is a deficient number, since it is larger than the sum of its proper divisors (141181).

133636331 is an equidigital number, since it uses as much as digits as its factorization.

133636331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141180.

The product of its digits is 8748, while the sum is 29.

The square root of 133636331 is about 11560.1181222339. The cubic root of 133636331 is about 511.2596454442.

The spelling of 133636331 in words is "one hundred thirty-three million, six hundred thirty-six thousand, three hundred thirty-one".