231143000 has 64 divisors (see below), whose sum is σ = 590073120. Its totient is φ = 84048000.

The previous prime is 231142993. The next prime is 231143023. The reversal of 231143000 is 341132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494 + ... + 21506.

Almost surely, 2^231143000 is an apocalyptic number.

231143000 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 231143000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295036560).

231143000 is an abundant number, since it is smaller than the sum of its proper divisors (358930120).

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

231143000 is a wasteful number, since it uses less digits than its factorization.

231143000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21045 (or 21031 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 231143000 is about 15203.3877803600. The cubic root of 231143000 is about 613.7058294390.

Adding to 231143000 its reverse (341132), we get a palindrome (231484132).

The spelling of 231143000 in words is "two hundred thirty-one million, one hundred forty-three thousand".