133430431 has 4 divisors (see below), whose sum is σ = 133459264. Its totient is φ = 133401600.

The previous prime is 133430389. The next prime is 133430449. The reversal of 133430431 is 134034331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134034331 = 3371 ⋅39761.

It is a cyclic number.

It is not a de Polignac number, because 133430431 - 2⁷ = 133430303 is a prime.

It is a super-2 number, since 2×133430431² = 35607359833691522, 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 (133430461) 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, 5730 + ... + 17311.

It is an arithmetic number, because the mean of its divisors is an integer number (33364816).

Almost surely, 2^133430431 is an apocalyptic number.

133430431 is a deficient number, since it is larger than the sum of its proper divisors (28833).

133430431 is an equidigital number, since it uses as much as digits as its factorization.

133430431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28832.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 133430431 is about 11551.2090709155. The cubic root of 133430431 is about 510.9969362679.

Adding to 133430431 its reverse (134034331), we get a palindrome (267464762).

The spelling of 133430431 in words is "one hundred thirty-three million, four hundred thirty thousand, four hundred thirty-one".