13431825 has 84 divisors (see below), whose sum is σ = 27648528. Its totient is φ = 6415200.

The previous prime is 13431811. The next prime is 13431857. The reversal of 13431825 is 52813431.

It is a happy number.

13431825 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 13431825 - 2⁸ = 13431569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 83 ways as a sum of consecutive naturals, for example, 200442 + ... + 200508.

Almost surely, 2^13431825 is an apocalyptic number.

13431825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13431825 is an abundant number, since it is smaller than the sum of its proper divisors (14216703).

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

13431825 is an equidigital number, since it uses as much as digits as its factorization.

13431825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 86 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 13431825 is about 3664.9454293345. The cubic root of 13431825 is about 237.7086624187.

The spelling of 13431825 in words is "thirteen million, four hundred thirty-one thousand, eight hundred twenty-five".