231430400 has 54 divisors (see below), whose sum is σ = 572842242. Its totient is φ = 92569600.

The previous prime is 231430399. The next prime is 231430417. The reversal of 231430400 is 4034132.

It can be written as a sum of positive squares in 3 ways, for example, as 36772096 + 194658304 = 6064^2 + 13952^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11681 + ... + 24480.

Almost surely, 2^231430400 is an apocalyptic number.

231430400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231430400 is an abundant number, since it is smaller than the sum of its proper divisors (341411842).

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

231430400 is an equidigital number, since it uses as much as digits as its factorization.

231430400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36187 (or 36168 counting only the distinct ones).

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

The square root of 231430400 is about 15212.8366848527. The cubic root of 231430400 is about 613.9600818620.

Adding to 231430400 its reverse (4034132), we get a palindrome (235464532).

The spelling of 231430400 in words is "two hundred thirty-one million, four hundred thirty thousand, four hundred".