223513444 has 48 divisors (see below), whose sum is σ = 494395776. Its totient is φ = 85881600.

The previous prime is 223513393. The next prime is 223513453. The reversal of 223513444 is 444315322.

It is a happy number.

It is a super-2 number, since 2×223513444² = 99916519297482272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 17514 + ... + 27454.

It is an arithmetic number, because the mean of its divisors is an integer number (10299912).

Almost surely, 2^223513444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223513444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247197888).

223513444 is an abundant number, since it is smaller than the sum of its proper divisors (270882332).

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

223513444 is a wasteful number, since it uses less digits than its factorization.

223513444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10036 (or 10034 counting only the distinct ones).

The product of its digits is 11520, while the sum is 28.

The square root of 223513444 is about 14950.3660155864. The cubic root of 223513444 is about 606.8777522243.

Adding to 223513444 its reverse (444315322), we get a palindrome (667828766).

The spelling of 223513444 in words is "two hundred twenty-three million, five hundred thirteen thousand, four hundred forty-four".