13161216 has 36 divisors (see below), whose sum is σ = 35030072. Its totient is φ = 4386816.

The previous prime is 13161193. The next prime is 13161229. The reversal of 13161216 is 61216131.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 13161192 and 13161201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7801 + ... + 9336.

Almost surely, 2^13161216 is an apocalyptic number.

13161216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13161216 is an abundant number, since it is smaller than the sum of its proper divisors (21868856).

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

13161216 is an equidigital number, since it uses as much as digits as its factorization.

13161216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17156 (or 17142 counting only the distinct ones).

The product of its digits is 216, while the sum is 21.

The square root of 13161216 is about 3627.8390261973. The cubic root of 13161216 is about 236.1014597741.

Adding to 13161216 its reverse (61216131), we get a palindrome (74377347).

The spelling of 13161216 in words is "thirteen million, one hundred sixty-one thousand, two hundred sixteen".