231426520443520 has 256 divisors, whose sum is σ = 582358182940800. Its totient is φ = 87815979417600.

The previous prime is 231426520443511. The next prime is 231426520443539. The reversal of 231426520443520 is 25344025624132.

231426520443520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1026756435 + ... + 1026981805.

Almost surely, 2^{231426520443520} is an apocalyptic number.

231426520443520 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 231426520443520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291179091470400).

231426520443520 is an abundant number, since it is smaller than the sum of its proper divisors (350931662497280).

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

231426520443520 is a wasteful number, since it uses less digits than its factorization.

231426520443520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226387 (or 226375 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 43.

The spelling of 231426520443520 in words is "two hundred thirty-one trillion, four hundred twenty-six billion, five hundred twenty million, four hundred forty-three thousand, five hundred twenty".