13206431 has 6 divisors (see below), whose sum is σ = 15362640. Its totient is φ = 11319756.

The previous prime is 13206421. The next prime is 13206449. The reversal of 13206431 is 13460231.

It is not a de Polignac number, because 13206431 - 2⁶ = 13206367 is a prime.

It is a super-2 number, since 2×13206431² = 348819639515522, 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 (13206421) 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 5 ways as a sum of consecutive naturals, for example, 134711 + ... + 134808.

It is an arithmetic number, because the mean of its divisors is an integer number (2560440).

Almost surely, 2^13206431 is an apocalyptic number.

13206431 is a deficient number, since it is larger than the sum of its proper divisors (2156209).

13206431 is an equidigital number, since it uses as much as digits as its factorization.

13206431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269533 (or 269526 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 13206431 is about 3634.0653543931. The cubic root of 13206431 is about 236.3715241271.

Adding to 13206431 its reverse (13460231), we get a palindrome (26666662).

The spelling of 13206431 in words is "thirteen million, two hundred six thousand, four hundred thirty-one".