231135000 has 160 divisors (see below), whose sum is σ = 761006400. Its totient is φ = 58320000.

The previous prime is 231134993. The next prime is 231135011. The reversal of 231135000 is 531132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 284595 + ... + 285405.

It is an arithmetic number, because the mean of its divisors is an integer number (4756290).

Almost surely, 2^231135000 is an apocalyptic number.

231135000 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 231135000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (380503200).

231135000 is an abundant number, since it is smaller than the sum of its proper divisors (529871400).

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

231135000 is a wasteful number, since it uses less digits than its factorization.

231135000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859 (or 840 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 231135000 is about 15203.1246788284. The cubic root of 231135000 is about 613.6987491131.

Adding to 231135000 its reverse (531132), we get a palindrome (231666132).

The spelling of 231135000 in words is "two hundred thirty-one million, one hundred thirty-five thousand".