223221312340 has 48 divisors (see below), whose sum is σ = 505438955280. Its totient is φ = 82319708160.

The previous prime is 223221312311. The next prime is 223221312341. The reversal of 223221312340 is 43213122322.

It can be written as a sum of positive squares in 8 ways, for example, as 878885316 + 222342427024 = 29646^2 + 471532^2 .

It is a super-3 number, since 3×223221312340³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223221312341) 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, 309405 + ... + 736324.

It is an arithmetic number, because the mean of its divisors is an integer number (10529978235).

Almost surely, 2^223221312340 is an apocalyptic number.

223221312340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223221312340 is an abundant number, since it is smaller than the sum of its proper divisors (282217642940).

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

223221312340 is a wasteful number, since it uses less digits than its factorization.

223221312340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046572 (or 1046570 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 223221312340 its reverse (43213122322), we get a palindrome (266434434662).

The spelling of 223221312340 in words is "two hundred twenty-three billion, two hundred twenty-one million, three hundred twelve thousand, three hundred forty".