231252042037566 has 16 divisors (see below), whose sum is σ = 504549909900288. Its totient is φ = 70076376375000.

The previous prime is 231252042037561. The next prime is 231252042037609. The reversal of 231252042037566 is 665730240252132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231252042037561) 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, 1751909409310 + ... + 1751909409441.

It is an arithmetic number, because the mean of its divisors is an integer number (31534369368768).

Almost surely, 2^{231252042037566} is an apocalyptic number.

231252042037566 is an abundant number, since it is smaller than the sum of its proper divisors (273297867862722).

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

231252042037566 is a wasteful number, since it uses less digits than its factorization.

231252042037566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503818818767.

The product of its (nonzero) digits is 3628800, while the sum is 48.

Adding to 231252042037566 its reverse (665730240252132), we get a palindrome (896982282289698).

The spelling of 231252042037566 in words is "two hundred thirty-one trillion, two hundred fifty-two billion, forty-two million, thirty-seven thousand, five hundred sixty-six".