133330031 has 4 divisors (see below), whose sum is σ = 141172992. Its totient is φ = 125487072.

The previous prime is 133330027. The next prime is 133330037. The reversal of 133330031 is 130033331.

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 133330031 - 2² = 133330027 is a prime.

It is a super-2 number, since 2×133330031² = 35553794332921922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 7842943 = 133330031 / (1 + 3 + 3 + 3 + 3 + 0 + 0 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133329991 and 133330009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133330037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3921455 + ... + 3921488.

It is an arithmetic number, because the mean of its divisors is an integer number (35293248).

Almost surely, 2^133330031 is an apocalyptic number.

133330031 is a deficient number, since it is larger than the sum of its proper divisors (7842961).

133330031 is an equidigital number, since it uses as much as digits as its factorization.

133330031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7842960.

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

The square root of 133330031 is about 11546.8623876792. The cubic root of 133330031 is about 510.8687372122.

Adding to 133330031 its reverse (130033331), we get a palindrome (263363362).

It can be divided in two parts, 1333300 and 31, that added together give a palindrome (1333331).

The spelling of 133330031 in words is "one hundred thirty-three million, three hundred thirty thousand, thirty-one".