13204431 has 8 divisors (see below), whose sum is σ = 19562160. Its totient is φ = 8802936.

The previous prime is 13204421. The next prime is 13204447. The reversal of 13204431 is 13440231.

It is not a de Polignac number, because 13204431 - 2⁹ = 13203919 is a prime.

It is a super-2 number, since 2×13204431² = 348713996067522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13204421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244500 + ... + 244553.

It is an arithmetic number, because the mean of its divisors is an integer number (2445270).

Almost surely, 2^13204431 is an apocalyptic number.

13204431 is a deficient number, since it is larger than the sum of its proper divisors (6357729).

13204431 is an equidigital number, since it uses as much as digits as its factorization.

13204431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489062 (or 489056 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 13204431 is about 3633.7901700566. The cubic root of 13204431 is about 236.3595913823.

Adding to 13204431 its reverse (13440231), we get a palindrome (26644662).

The spelling of 13204431 in words is "thirteen million, two hundred four thousand, four hundred thirty-one".