231610240 has 64 divisors (see below), whose sum is σ = 572832000. Its totient is φ = 89442304.

The previous prime is 231610237. The next prime is 231610241. The reversal of 231610240 is 42016132.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231610241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12321 + ... + 24799.

It is an arithmetic number, because the mean of its divisors is an integer number (8950500).

Almost surely, 2^231610240 is an apocalyptic number.

231610240 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 231610240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286416000).

231610240 is an abundant number, since it is smaller than the sum of its proper divisors (341221760).

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

231610240 is a wasteful number, since it uses less digits than its factorization.

231610240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12527 (or 12515 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 231610240 is about 15218.7463347018. The cubic root of 231610240 is about 614.1190727769.

Adding to 231610240 its reverse (42016132), we get a palindrome (273626372).

The spelling of 231610240 in words is "two hundred thirty-one million, six hundred ten thousand, two hundred forty".