13221198 has 16 divisors (see below), whose sum is σ = 29380560. Its totient is φ = 4407048.

The previous prime is 13221191. The next prime is 13221199. The reversal of 13221198 is 89112231.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122365 + ... + 122472.

It is an arithmetic number, because the mean of its divisors is an integer number (1836285).

Almost surely, 2^13221198 is an apocalyptic number.

13221198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13221198 is an abundant number, since it is smaller than the sum of its proper divisors (16159362).

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

13221198 is a wasteful number, since it uses less digits than its factorization.

13221198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244848 (or 244842 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 13221198 is about 3636.0965333720. The cubic root of 13221198 is about 236.4595922842.

The spelling of 13221198 in words is "thirteen million, two hundred twenty-one thousand, one hundred ninety-eight".