13215920 has 60 divisors (see below), whose sum is σ = 32158656. Its totient is φ = 5045760.

The previous prime is 13215913. The next prime is 13215929. The reversal of 13215920 is 2951231.

It is not an unprimeable number, because it can be changed into a prime (13215929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181004 + ... + 181076.

Almost surely, 2^13215920 is an apocalyptic number.

13215920 is a gapful number since it is divisible by the number (10) 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 13215920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16079328).

13215920 is an abundant number, since it is smaller than the sum of its proper divisors (18942736).

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

13215920 is an equidigital number, since it uses as much as digits as its factorization.

13215920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 13215920 is about 3635.3706826127. The cubic root of 13215920 is about 236.4281226236.

The spelling of 13215920 in words is "thirteen million, two hundred fifteen thousand, nine hundred twenty".