13218822 has 32 divisors (see below), whose sum is σ = 29864160. Its totient is φ = 4332960.

The previous prime is 13218743. The next prime is 13218823. The reversal of 13218822 is 22881231.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13218823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1288 + ... + 5300.

It is an arithmetic number, because the mean of its divisors is an integer number (933255).

Almost surely, 2^13218822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13218822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14932080).

13218822 is an abundant number, since it is smaller than the sum of its proper divisors (16645338).

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

13218822 is a wasteful number, since it uses less digits than its factorization.

13218822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4085 (or 4079 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 13218822 is about 3635.7697946927. The cubic root of 13218822 is about 236.4454266074.

The spelling of 13218822 in words is "thirteen million, two hundred eighteen thousand, eight hundred twenty-two".