133235031 has 4 divisors (see below), whose sum is σ = 177646712. Its totient is φ = 88823352.

The previous prime is 133235017. The next prime is 133235033. The reversal of 133235031 is 130532331.

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

It is a de Polignac number, because none of the positive numbers 2^k-133235031 is a prime.

It is a super-2 number, since 2×133235031² = 35503146971141922, 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 = 133234989 and 133235007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133235033) 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, 22205836 + ... + 22205841.

It is an arithmetic number, because the mean of its divisors is an integer number (44411678).

Almost surely, 2^133235031 is an apocalyptic number.

133235031 is a deficient number, since it is larger than the sum of its proper divisors (44411681).

133235031 is an equidigital number, since it uses as much as digits as its factorization.

133235031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44411680.

The product of its (nonzero) digits is 810, while the sum is 21.

The square root of 133235031 is about 11542.7479830411. The cubic root of 133235031 is about 510.7473740530.

Adding to 133235031 its reverse (130532331), we get a palindrome (263767362).

It can be divided in two parts, 1332 and 35031, that added together give a palindrome (36363).

The spelling of 133235031 in words is "one hundred thirty-three million, two hundred thirty-five thousand, thirty-one".