13431306 has 32 divisors (see below), whose sum is σ = 30873600. Its totient is φ = 3815856.

The previous prime is 13431251. The next prime is 13431323. The reversal of 13431306 is 60313431.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7555 + ... + 9161.

It is an arithmetic number, because the mean of its divisors is an integer number (964800).

Almost surely, 2^13431306 is an apocalyptic number.

13431306 is an abundant number, since it is smaller than the sum of its proper divisors (17442294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13431306 is a wasteful number, since it uses less digits than its factorization.

13431306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 13431306 is about 3664.8746226849. The cubic root of 13431306 is about 237.7056007254.

Adding to 13431306 its reverse (60313431), we get a palindrome (73744737).

The spelling of 13431306 in words is "thirteen million, four hundred thirty-one thousand, three hundred six".