133303031 has 4 divisors (see below), whose sum is σ = 140319000. Its totient is φ = 126287064.

The previous prime is 133303021. The next prime is 133303033. The reversal of 133303031 is 130303331.

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 133303031 - 2¹⁰ = 133302007 is a prime.

It is a super-2 number, since 2×133303031² = 35539396147573922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133303033) 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, 3507956 + ... + 3507993.

It is an arithmetic number, because the mean of its divisors is an integer number (35079750).

Almost surely, 2^133303031 is an apocalyptic number.

133303031 is a deficient number, since it is larger than the sum of its proper divisors (7015969).

133303031 is an equidigital number, since it uses as much as digits as its factorization.

133303031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7015968.

The product of its (nonzero) digits is 243, while the sum is 17.

The square root of 133303031 is about 11545.6931797099. The cubic root of 133303031 is about 510.8342503904.

Adding to 133303031 its reverse (130303331), we get a palindrome (263606362).

It can be divided in two parts, 13330 and 3031, that added together give a palindrome (16361).

The spelling of 133303031 in words is "one hundred thirty-three million, three hundred three thousand, thirty-one".