223431400 has 48 divisors (see below), whose sum is σ = 521534700. Its totient is φ = 89018880.

The previous prime is 223431379. The next prime is 223431409. The reversal of 223431400 is 4134322.

It can be written as a sum of positive squares in 6 ways, for example, as 407044 + 223024356 = 638^2 + 14934^2 .

It is not an unprimeable number, because it can be changed into a prime (223431409) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 51724 + ... + 55876.

Almost surely, 2^223431400 is an apocalyptic number.

223431400 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 223431400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260767350).

223431400 is an abundant number, since it is smaller than the sum of its proper divisors (298103300).

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

223431400 is a wasteful number, since it uses less digits than its factorization.

223431400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4438 (or 4429 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 223431400 is about 14947.6218844337. The cubic root of 223431400 is about 606.8034885755.

Adding to 223431400 its reverse (4134322), we get a palindrome (227565722).

The spelling of 223431400 in words is "two hundred twenty-three million, four hundred thirty-one thousand, four hundred".