231443231400 has 72 divisors (see below), whose sum is σ = 777263524830. Its totient is φ = 61718194560.

The previous prime is 231443231333. The next prime is 231443231449. The reversal of 231443231400 is 4132344132.

231443231400 is a `hidden beast` number, since 2 + 314 + 4 + 32 + 314 + 0 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 201265287876 + 30177943524 = 448626^2 + 173718^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 64287987 + ... + 64291586.

Almost surely, 2^231443231400 is an apocalyptic number.

231443231400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231443231400 is an abundant number, since it is smaller than the sum of its proper divisors (545820293430).

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

231443231400 is a wasteful number, since it uses less digits than its factorization.

231443231400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128579595 (or 128579583 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 231443231400 its reverse (4132344132), we get a palindrome (235575575532).

The spelling of 231443231400 in words is "two hundred thirty-one billion, four hundred forty-three million, two hundred thirty-one thousand, four hundred".