133000331 has 4 divisors (see below), whose sum is σ = 133034664. Its totient is φ = 132966000.

The previous prime is 133000321. The next prime is 133000349.

133000331 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 133000331 - 2¹⁴ = 132983947 is a prime.

It is a super-2 number, since 2×133000331² = 35378176092219122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133000321) 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, 10490 + ... + 19391.

It is an arithmetic number, because the mean of its divisors is an integer number (33258666).

Almost surely, 2^133000331 is an apocalyptic number.

133000331 is a deficient number, since it is larger than the sum of its proper divisors (34333).

133000331 is an equidigital number, since it uses as much as digits as its factorization.

133000331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34332.

The product of its (nonzero) digits is 81, while the sum is 14.

The square root of 133000331 is about 11532.5769453319. The cubic root of 133000331 is about 510.4472956532.

It can be divided in two parts, 133000 and 331, that added together give a palindrome (133331).

The spelling of 133000331 in words is "one hundred thirty-three million, three hundred thirty-one", and thus it is an aban number.