13133431 has 4 divisors (see below), whose sum is σ = 13183632. Its totient is φ = 13083232.

The previous prime is 13133423. The next prime is 13133467. The reversal of 13133431 is 13433131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13433131 = 1063 ⋅12637.

It is a cyclic number.

It is not a de Polignac number, because 13133431 - 2³ = 13133423 is a prime.

It is a super-4 number, since 4×13133431⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13133399 and 13133408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13133411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24706 + ... + 25231.

It is an arithmetic number, because the mean of its divisors is an integer number (3295908).

Almost surely, 2^13133431 is an apocalyptic number.

13133431 is a deficient number, since it is larger than the sum of its proper divisors (50201).

13133431 is an equidigital number, since it uses as much as digits as its factorization.

13133431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50200.

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

The square root of 13133431 is about 3624.0075882923. The cubic root of 13133431 is about 235.9351959864.

Adding to 13133431 its reverse (13433131), we get a palindrome (26566562).

The spelling of 13133431 in words is "thirteen million, one hundred thirty-three thousand, four hundred thirty-one".