231420112240 has 80 divisors (see below), whose sum is σ = 544477428000. Its totient is φ = 91466265600.

The previous prime is 231420112237. The next prime is 231420112249. The reversal of 231420112240 is 42211024132.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231420112249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4003222 + ... + 4060618.

It is an arithmetic number, because the mean of its divisors is an integer number (6805967850).

Almost surely, 2^231420112240 is an apocalyptic number.

231420112240 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 231420112240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272238714000).

231420112240 is an abundant number, since it is smaller than the sum of its proper divisors (313057315760).

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

231420112240 is a wasteful number, since it uses less digits than its factorization.

231420112240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58010 (or 58004 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 231420112240 its reverse (42211024132), we get a palindrome (273631136372).

The spelling of 231420112240 in words is "two hundred thirty-one billion, four hundred twenty million, one hundred twelve thousand, two hundred forty".