13222220 has 24 divisors (see below), whose sum is σ = 30291408. Its totient is φ = 4808000.

The previous prime is 13222207. The next prime is 13222229. The reversal of 13222220 is 2222231.

It is a junction number, because it is equal to n+sod(n) for n = 13222195 and 13222204.

It is not an unprimeable number, because it can be changed into a prime (13222229) 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, 29831 + ... + 30270.

It is an arithmetic number, because the mean of its divisors is an integer number (1262142).

Almost surely, 2^13222220 is an apocalyptic number.

13222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13222220 is an abundant number, since it is smaller than the sum of its proper divisors (17069188).

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

13222220 is a wasteful number, since it uses less digits than its factorization.

13222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60121 (or 60119 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 13222220 is about 3636.2370659791. The cubic root of 13222220 is about 236.4656849110.

Adding to 13222220 its reverse (2222231), we get a palindrome (15444451).

The spelling of 13222220 in words is "thirteen million, two hundred twenty-two thousand, two hundred twenty".