231000210 has 120 divisors (see below), whose sum is σ = 701314380. Its totient is φ = 52750656.

The previous prime is 231000193. The next prime is 231000239. The reversal of 231000210 is 12000132.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 229249881 + 1750329 = 15141^2 + 1323^2 .

It is a super-2 number, since 2×231000210² = 106722194040088200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 231000192 and 231000201.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 215556 + ... + 216624.

Almost surely, 2^231000210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231000210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350657190).

231000210 is an abundant number, since it is smaller than the sum of its proper divisors (470314170).

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

231000210 is a wasteful number, since it uses less digits than its factorization.

231000210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110 (or 1086 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 231000210 is about 15198.6910620619. The cubic root of 231000210 is about 613.5794298992.

Adding to 231000210 its reverse (12000132), we get a palindrome (243000342).

The spelling of 231000210 in words is "two hundred thirty-one million, two hundred ten", and thus it is an aban number.