133310431 has 4 divisors (see below), whose sum is σ = 133358472. Its totient is φ = 133262392.

The previous prime is 133310417. The next prime is 133310459. The reversal of 133310431 is 134013331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134013331 = 1931 ⋅69401.

It is a cyclic number.

It is not a de Polignac number, because 133310431 - 2²¹ = 131213279 is a prime.

It is a super-2 number, since 2×133310431² = 35543342026811522, 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 = 133310399 and 133310408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130310431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19585 + ... + 25498.

It is an arithmetic number, because the mean of its divisors is an integer number (33339618).

Almost surely, 2^133310431 is an apocalyptic number.

133310431 is a deficient number, since it is larger than the sum of its proper divisors (48041).

133310431 is an equidigital number, since it uses as much as digits as its factorization.

133310431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48040.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 133310431 is about 11546.0136410798. The cubic root of 133310431 is about 510.8437027974.

Adding to 133310431 its reverse (134013331), we get a palindrome (267323762).

The spelling of 133310431 in words is "one hundred thirty-three million, three hundred ten thousand, four hundred thirty-one".