231663000 has 256 divisors, whose sum is σ = 776355840. Its totient is φ = 57408000.

The previous prime is 231662999. The next prime is 231663001. The reversal of 231663000 is 366132.

It is an interprime number because it is at equal distance from previous prime (231662999) and next prime (231663001).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231663001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4370974 + ... + 4371026.

It is an arithmetic number, because the mean of its divisors is an integer number (3032640).

Almost surely, 2^231663000 is an apocalyptic number.

231663000 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 231663000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388177920).

231663000 is an abundant number, since it is smaller than the sum of its proper divisors (544692840).

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

231663000 is a wasteful number, since it uses less digits than its factorization.

231663000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 231663000 is about 15220.4796245059. The cubic root of 231663000 is about 614.1657006265.

The spelling of 231663000 in words is "two hundred thirty-one million, six hundred sixty-three thousand".