231143424 has 96 divisors (see below), whose sum is σ = 652775760. Its totient is φ = 72482816.

The previous prime is 231143387. The next prime is 231143443. The reversal of 231143424 is 424341132.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 231143394 and 231143403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103342 + ... + 105554.

Almost surely, 2^231143424 is an apocalyptic number.

231143424 is a gapful number since it is divisible by the number (24) 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 231143424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326387880).

231143424 is an abundant number, since it is smaller than the sum of its proper divisors (421632336).

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

231143424 is a wasteful number, since it uses less digits than its factorization.

231143424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255 (or 2235 counting only the distinct ones).

The product of its digits is 2304, while the sum is 24.

The square root of 231143424 is about 15203.4017246141. The cubic root of 231143424 is about 613.7062046917.

Adding to 231143424 its reverse (424341132), we get a palindrome (655484556).

The spelling of 231143424 in words is "two hundred thirty-one million, one hundred forty-three thousand, four hundred twenty-four".