13215320 has 16 divisors (see below), whose sum is σ = 29734560. Its totient is φ = 5286112.

The previous prime is 13215313. The next prime is 13215337. The reversal of 13215320 is 2351231.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 165152 + ... + 165231.

It is an arithmetic number, because the mean of its divisors is an integer number (1858410).

Almost surely, 2^13215320 is an apocalyptic number.

13215320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13215320 is an abundant number, since it is smaller than the sum of its proper divisors (16519240).

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

13215320 is a wasteful number, since it uses less digits than its factorization.

13215320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330394 (or 330390 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 13215320 is about 3635.2881591423. The cubic root of 13215320 is about 236.4245446404.

Adding to 13215320 its reverse (2351231), we get a palindrome (15566551).

The spelling of 13215320 in words is "thirteen million, two hundred fifteen thousand, three hundred twenty".