231020312240 has 20 divisors (see below), whose sum is σ = 537122226144. Its totient is φ = 92408124864.

The previous prime is 231020312231. The next prime is 231020312287. The reversal of 231020312240 is 42213020132.

231020312240 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1443876872 + ... + 1443877031.

Almost surely, 2^231020312240 is an apocalyptic number.

231020312240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231020312240 is an abundant number, since it is smaller than the sum of its proper divisors (306101913904).

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

231020312240 is a wasteful number, since it uses less digits than its factorization.

231020312240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2887753916 (or 2887753910 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 231020312240 its reverse (42213020132), we get a palindrome (273233332372).

The spelling of 231020312240 in words is "two hundred thirty-one billion, twenty million, three hundred twelve thousand, two hundred forty".