223445442 has 48 divisors (see below), whose sum is σ = 501252192. Its totient is φ = 65854080.

The previous prime is 223445429. The next prime is 223445503. The reversal of 223445442 is 244544322.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89118 + ... + 91590.

It is an arithmetic number, because the mean of its divisors is an integer number (10442754).

Almost surely, 2^223445442 is an apocalyptic number.

223445442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 223445442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250626096).

223445442 is an abundant number, since it is smaller than the sum of its proper divisors (277806750).

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

223445442 is a wasteful number, since it uses less digits than its factorization.

223445442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563 (or 2526 counting only the distinct ones).

The product of its digits is 30720, while the sum is 30.

The square root of 223445442 is about 14948.0915838779. The cubic root of 223445442 is about 606.8162002417.

Adding to 223445442 its reverse (244544322), we get a palindrome (467989764).

The spelling of 223445442 in words is "two hundred twenty-three million, four hundred forty-five thousand, four hundred forty-two".