242170822540 has 12 divisors (see below), whose sum is σ = 508558727376. Its totient is φ = 96868329008.

The previous prime is 242170822511. The next prime is 242170822541. The reversal of 242170822540 is 45228071242.

It is a self number, because there is not a number n which added to its sum of digits gives 242170822540.

It is not an unprimeable number, because it can be changed into a prime (242170822541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6054270544 + ... + 6054270583.

It is an arithmetic number, because the mean of its divisors is an integer number (42379893948).

Almost surely, 2^242170822540 is an apocalyptic number.

242170822540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242170822540 is an abundant number, since it is smaller than the sum of its proper divisors (266387904836).

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

242170822540 is a wasteful number, since it uses less digits than its factorization.

242170822540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12108541136 (or 12108541134 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 37.

Adding to 242170822540 its reverse (45228071242), we get a palindrome (287398893782).

The spelling of 242170822540 in words is "two hundred forty-two billion, one hundred seventy million, eight hundred twenty-two thousand, five hundred forty".