133240031 has 8 divisors (see below), whose sum is σ = 135195840. Its totient is φ = 131294592.

The previous prime is 133240021. The next prime is 133240061. The reversal of 133240031 is 130042331.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133240031 - 2²² = 129045727 is a prime.

It is a super-2 number, since 2×133240031² = 35505811721761922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133239991 and 133240009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133240021) 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 7 ways as a sum of consecutive naturals, for example, 25466 + ... + 30248.

It is an arithmetic number, because the mean of its divisors is an integer number (16899480).

Almost surely, 2^133240031 is an apocalyptic number.

133240031 is a deficient number, since it is larger than the sum of its proper divisors (1955809).

133240031 is an equidigital number, since it uses as much as digits as its factorization.

133240031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5185.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 133240031 is about 11542.9645672158. The cubic root of 133240031 is about 510.7537630257.

Adding to 133240031 its reverse (130042331), we get a palindrome (263282362).

The spelling of 133240031 in words is "one hundred thirty-three million, two hundred forty thousand, thirty-one".