13123216 has 10 divisors (see below), whose sum is σ = 25426262. Its totient is φ = 6561600.

The previous prime is 13123211. The next prime is 13123217. The reversal of 13123216 is 61232131.

It can be written as a sum of positive squares in only one way, i.e., 12960000 + 163216 = 3600^2 + 404^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13123193 and 13123202.

It is not an unprimeable number, because it can be changed into a prime (13123211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410085 + ... + 410116.

Almost surely, 2^13123216 is an apocalyptic number.

13123216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13123216 is a deficient number, since it is larger than the sum of its proper divisors (12303046).

13123216 is an equidigital number, since it uses as much as digits as its factorization.

13123216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820209 (or 820203 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 13123216 is about 3622.5979627886. The cubic root of 13123216 is about 235.8740110826.

Adding to 13123216 its reverse (61232131), we get a palindrome (74355347).

The spelling of 13123216 in words is "thirteen million, one hundred twenty-three thousand, two hundred sixteen".