231223400 has 48 divisors (see below), whose sum is σ = 538840140. Its totient is φ = 92275200.

The previous prime is 231223387. The next prime is 231223403. The reversal of 231223400 is 4322132.

231223400 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 21031396 + 210192004 = 4586^2 + 14498^2 .

It is not an unprimeable number, because it can be changed into a prime (231223403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107132 + ... + 109268.

Almost surely, 2^231223400 is an apocalyptic number.

231223400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231223400 is an abundant number, since it is smaller than the sum of its proper divisors (307616740).

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

231223400 is a wasteful number, since it uses less digits than its factorization.

231223400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694 (or 2685 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 231223400 is about 15206.0316979809. The cubic root of 231223400 is about 613.7769776442.

Adding to 231223400 its reverse (4322132), we get a palindrome (235545532).

The spelling of 231223400 in words is "two hundred thirty-one million, two hundred twenty-three thousand, four hundred".