231545355212240 has 80 divisors (see below), whose sum is σ = 538538978263680. Its totient is φ = 92584421368320.

The previous prime is 231545355212233. The next prime is 231545355212243. The reversal of 231545355212240 is 42212553545132.

231545355212240 is digitally balanced in base 2, because in such base 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 (80).

It is a super-2 number, since 2×231545355212240² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231545355212191 and 231545355212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231545355212243) 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, 4746800171 + ... + 4746848949.

It is an arithmetic number, because the mean of its divisors is an integer number (6731737228296).

Almost surely, 2^{231545355212240} is an apocalyptic number.

231545355212240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231545355212240 is an abundant number, since it is smaller than the sum of its proper divisors (306993623051440).

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

231545355212240 is a wasteful number, since it uses less digits than its factorization.

231545355212240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69180 (or 69174 counting only the distinct ones).

The product of its (nonzero) digits is 1440000, while the sum is 44.

The spelling of 231545355212240 in words is "two hundred thirty-one trillion, five hundred forty-five billion, three hundred fifty-five million, two hundred twelve thousand, two hundred forty".