231420040344340 has 24 divisors (see below), whose sum is σ = 485989705512360. Its totient is φ = 92566564558848.

The previous prime is 231420040344331. The next prime is 231420040344341. The reversal of 231420040344340 is 43443040024132.

231420040344340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 100777746371344 + 130642293972996 = 10038812^2 + 11429886^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231420040344296 and 231420040344305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231420040344341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89415925 + ... + 91967644.

It is an arithmetic number, because the mean of its divisors is an integer number (20249571063015).

Almost surely, 2^{231420040344340} is an apocalyptic number.

231420040344340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231420040344340 is an abundant number, since it is smaller than the sum of its proper divisors (254569665168020).

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

231420040344340 is a wasteful number, since it uses less digits than its factorization.

231420040344340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181447371 (or 181447369 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 34.

Adding to 231420040344340 its reverse (43443040024132), we get a palindrome (274863080368472).

The spelling of 231420040344340 in words is "two hundred thirty-one trillion, four hundred twenty billion, forty million, three hundred forty-four thousand, three hundred forty".