231004560 has 160 divisors (see below), whose sum is σ = 752808960. Its totient is φ = 58521600.

The previous prime is 231004559. The next prime is 231004561. The reversal of 231004560 is 65400132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (231004559) and next prime (231004561).

It is not an unprimeable number, because it can be changed into a prime (231004561) 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 31 ways as a sum of consecutive naturals, for example, 453586 + ... + 454094.

It is an arithmetic number, because the mean of its divisors is an integer number (4705056).

Almost surely, 2^231004560 is an apocalyptic number.

231004560 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 231004560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376404480).

231004560 is an abundant number, since it is smaller than the sum of its proper divisors (521804400).

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

231004560 is a wasteful number, since it uses less digits than its factorization.

231004560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 231004560 is about 15198.8341658168. The cubic root of 231004560 is about 613.5832813442.

Adding to 231004560 its reverse (65400132), we get a palindrome (296404692).

The spelling of 231004560 in words is "two hundred thirty-one million, four thousand, five hundred sixty".