223555440 has 160 divisors (see below), whose sum is σ = 740577600. Its totient is φ = 55590912.

The previous prime is 223555439. The next prime is 223555441. The reversal of 223555440 is 44555322.

223555440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (223555439) and next prime (223555441).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 223555398 and 223555407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223555441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 640386 + ... + 640734.

It is an arithmetic number, because the mean of its divisors is an integer number (4628610).

Almost surely, 2^223555440 is an apocalyptic number.

223555440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223555440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370288800).

223555440 is an abundant number, since it is smaller than the sum of its proper divisors (517022160).

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

223555440 is a wasteful number, since it uses less digits than its factorization.

223555440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 30.

The square root of 223555440 is about 14951.7704637277. The cubic root of 223555440 is about 606.9157586511.

It can be divided in two parts, 2235 and 55440, that added together give a palindrome (57675).

The spelling of 223555440 in words is "two hundred twenty-three million, five hundred fifty-five thousand, four hundred forty".