231312420240 has 320 divisors, whose sum is σ = 792406996992. Its totient is φ = 55352012800.

The previous prime is 231312420223. The next prime is 231312420263. The reversal of 231312420240 is 42024213132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 231312420240.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 87849964 + ... + 87852596.

Almost surely, 2^231312420240 is an apocalyptic number.

231312420240 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 231312420240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396203498496).

231312420240 is an abundant number, since it is smaller than the sum of its proper divisors (561094576752).

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

231312420240 is a wasteful number, since it uses less digits than its factorization.

231312420240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3078 (or 3072 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 231312420240 its reverse (42024213132), we get a palindrome (273336633372).

The spelling of 231312420240 in words is "two hundred thirty-one billion, three hundred twelve million, four hundred twenty thousand, two hundred forty".