133040431 has 4 divisors (see below), whose sum is σ = 133341192. Its totient is φ = 132739672.

The previous prime is 133040423. The next prime is 133040471. The reversal of 133040431 is 134040331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134040331 = 43 ⋅3117217.

It is a cyclic number.

It is not a de Polignac number, because 133040431 - 2³ = 133040423 is a prime.

It is a super-2 number, since 2×133040431² = 35399512561331522, 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 = 133040399 and 133040408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133040471) 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, 149716 + ... + 150601.

It is an arithmetic number, because the mean of its divisors is an integer number (33335298).

Almost surely, 2^133040431 is an apocalyptic number.

133040431 is a deficient number, since it is larger than the sum of its proper divisors (300761).

133040431 is an equidigital number, since it uses as much as digits as its factorization.

133040431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300760.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 133040431 is about 11534.3153676324. The cubic root of 133040431 is about 510.4985909635.

Adding to 133040431 its reverse (134040331), we get a palindrome (267080762).

The spelling of 133040431 in words is "one hundred thirty-three million, forty thousand, four hundred thirty-one".