1222323220 has 24 divisors (see below), whose sum is σ = 2603035008. Its totient is φ = 482042400.

The previous prime is 1222323209. The next prime is 1222323229. The reversal of 1222323220 is 223232221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222323229) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 428976 + ... + 431815.

It is an arithmetic number, because the mean of its divisors is an integer number (108459792).

Almost surely, 2^1222323220 is an apocalyptic number.

1222323220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222323220 is an abundant number, since it is smaller than the sum of its proper divisors (1380711788).

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

1222323220 is a wasteful number, since it uses less digits than its factorization.

1222323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860871 (or 860869 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1222323220 is about 34961.7393732062. The cubic root of 1222323220 is about 1069.2075595365.

Adding to 1222323220 its reverse (223232221), we get a palindrome (1445555441).

Subtracting from 1222323220 its reverse (223232221), we obtain a palindrome (999090999).

The spelling of 1222323220 in words is "one billion, two hundred twenty-two million, three hundred twenty-three thousand, two hundred twenty".