231712530 has 64 divisors (see below), whose sum is σ = 643645440. Its totient is φ = 52288704.

The previous prime is 231712493. The next prime is 231712597. The reversal of 231712530 is 35217132.

It is a self number, because there is not a number n which added to its sum of digits gives 231712530.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9607 + ... + 23573.

It is an arithmetic number, because the mean of its divisors is an integer number (10056960).

Almost surely, 2^231712530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231712530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321822720).

231712530 is an abundant number, since it is smaller than the sum of its proper divisors (411932910).

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

231712530 is a wasteful number, since it uses less digits than its factorization.

231712530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14063.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 231712530 is about 15222.1066216211. The cubic root of 231712530 is about 614.2094674480.

Adding to 231712530 its reverse (35217132), we get a palindrome (266929662).

The spelling of 231712530 in words is "two hundred thirty-one million, seven hundred twelve thousand, five hundred thirty".