231242142443501 has 16 divisors (see below), whose sum is σ = 265606235136000. Its totient is φ = 197210436060528.

The previous prime is 231242142443423. The next prime is 231242142443567. The reversal of 231242142443501 is 105344241242132.

It is a cyclic number.

It is not a de Polignac number, because 231242142443501 - 2⁴² = 226844095932397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231242142443581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340442846 + ... + 341121408.

It is an arithmetic number, because the mean of its divisors is an integer number (16600389696000).

Almost surely, 2^{231242142443501} is an apocalyptic number.

It is an amenable number.

231242142443501 is a deficient number, since it is larger than the sum of its proper divisors (34364092692499).

231242142443501 is a wasteful number, since it uses less digits than its factorization.

231242142443501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923408.

The product of its (nonzero) digits is 184320, while the sum is 38.

Adding to 231242142443501 its reverse (105344241242132), we get a palindrome (336586383685633).

The spelling of 231242142443501 in words is "two hundred thirty-one trillion, two hundred forty-two billion, one hundred forty-two million, four hundred forty-three thousand, five hundred one".