223131440 has 160 divisors (see below), whose sum is σ = 635435520. Its totient is φ = 71165952.

The previous prime is 223131413. The next prime is 223131457. The reversal of 223131440 is 44131322.

223131440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×223131440³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 712724 + ... + 713036.

It is an arithmetic number, because the mean of its divisors is an integer number (3971472).

Almost surely, 2^223131440 is an apocalyptic number.

223131440 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 223131440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317717760).

223131440 is an abundant number, since it is smaller than the sum of its proper divisors (412304080).

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

223131440 is a wasteful number, since it uses less digits than its factorization.

223131440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 223131440 is about 14937.5848114747. The cubic root of 223131440 is about 606.5318193762.

Adding to 223131440 its reverse (44131322), we get a palindrome (267262762).

The spelling of 223131440 in words is "two hundred twenty-three million, one hundred thirty-one thousand, four hundred forty".