13431616 has 28 divisors (see below), whose sum is σ = 29077920. Its totient is φ = 6104960.

The previous prime is 13431599. The next prime is 13431619. The reversal of 13431616 is 61613431.

It is a happy number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13431619) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8836 + ... + 10243.

Almost surely, 2^13431616 is an apocalyptic number.

13431616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13431616 is an abundant number, since it is smaller than the sum of its proper divisors (15646304).

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

13431616 is a wasteful number, since it uses less digits than its factorization.

13431616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19102 (or 19092 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 13431616 is about 3664.9169158386. The cubic root of 13431616 is about 237.7074294920.

The spelling of 13431616 in words is "thirteen million, four hundred thirty-one thousand, six hundred sixteen".