242521312131646 has 16 divisors (see below), whose sum is σ = 365961653608320. Its totient is φ = 120534099620760.

The previous prime is 242521312131643. The next prime is 242521312131667. The reversal of 242521312131646 is 646131213125242.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242521312131641) 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, 101007745 + ... + 103380883.

It is an arithmetic number, because the mean of its divisors is an integer number (22872603350520).

Almost surely, 2^{242521312131646} is an apocalyptic number.

242521312131646 is a deficient number, since it is larger than the sum of its proper divisors (123440341476674).

242521312131646 is a wasteful number, since it uses less digits than its factorization.

242521312131646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679279.

The product of its digits is 414720, while the sum is 43.

Adding to 242521312131646 its reverse (646131213125242), we get a palindrome (888652525256888).

The spelling of 242521312131646 in words is "two hundred forty-two trillion, five hundred twenty-one billion, three hundred twelve million, one hundred thirty-one thousand, six hundred forty-six".