223143440 has 40 divisors (see below), whose sum is σ = 558719448. Its totient is φ = 82391040.

The previous prime is 223143419. The next prime is 223143449. The reversal of 223143440 is 44341322.

It can be written as a sum of positive squares in 4 ways, for example, as 3748096 + 219395344 = 1936^2 + 14812^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×223143440³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (223143449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106241 + ... + 108320.

Almost surely, 2^223143440 is an apocalyptic number.

223143440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223143440 is an abundant number, since it is smaller than the sum of its proper divisors (335576008).

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

223143440 is a wasteful number, since it uses less digits than its factorization.

223143440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214587 (or 214581 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 223143440 is about 14937.9864774340. The cubic root of 223143440 is about 606.5426922670.

Adding to 223143440 its reverse (44341322), we get a palindrome (267484762).

The spelling of 223143440 in words is "two hundred twenty-three million, one hundred forty-three thousand, four hundred forty".