13212318 has 32 divisors (see below), whose sum is σ = 30449664. Its totient is φ = 3743712.

The previous prime is 13212307. The next prime is 13212337. The reversal of 13212318 is 81321231.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 13212294 and 13212303.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4096 + ... + 6572.

It is an arithmetic number, because the mean of its divisors is an integer number (951552).

Almost surely, 2^13212318 is an apocalyptic number.

13212318 is an abundant number, since it is smaller than the sum of its proper divisors (17237346).

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

13212318 is a wasteful number, since it uses less digits than its factorization.

13212318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616.

The product of its digits is 288, while the sum is 21.

The square root of 13212318 is about 3634.8752385742. The cubic root of 13212318 is about 236.4066411710.

Adding to 13212318 its reverse (81321231), we get a palindrome (94533549).

It can be divided in two parts, 13212 and 318, that added together give a triangular number (13530 = T₁₆₄).

The spelling of 13212318 in words is "thirteen million, two hundred twelve thousand, three hundred eighteen".