13215432 has 64 divisors (see below), whose sum is σ = 34992000. Its totient is φ = 4150784.

The previous prime is 13215427. The next prime is 13215439. The reversal of 13215432 is 23451231.

It is a junction number, because it is equal to n+sod(n) for n = 13215399 and 13215408.

It is not an unprimeable number, because it can be changed into a prime (13215439) 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 15 ways as a sum of consecutive naturals, for example, 48994 + ... + 49262.

It is an arithmetic number, because the mean of its divisors is an integer number (546750).

Almost surely, 2^13215432 is an apocalyptic number.

13215432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13215432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17496000).

13215432 is an abundant number, since it is smaller than the sum of its proper divisors (21776568).

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

13215432 is a wasteful number, since it uses less digits than its factorization.

13215432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 386 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 13215432 is about 3635.3035636656. The cubic root of 13215432 is about 236.4252125388.

Adding to 13215432 its reverse (23451231), we get a palindrome (36666663).

The spelling of 13215432 in words is "thirteen million, two hundred fifteen thousand, four hundred thirty-two".