242515705521 has 8 divisors (see below), whose sum is σ = 323362959840. Its totient is φ = 161672794112.

The previous prime is 242515705517. The next prime is 242515705541. The reversal of 242515705521 is 125507515242.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 242515705521 - 2² = 242515705517 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 242515705521.

It is not an unprimeable number, because it can be changed into a prime (242515705501) 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, 953115 + ... + 1180448.

It is an arithmetic number, because the mean of its divisors is an integer number (40420369980).

Almost surely, 2^242515705521 is an apocalyptic number.

It is an amenable number.

242515705521 is a deficient number, since it is larger than the sum of its proper divisors (80847254319).

242515705521 is a wasteful number, since it uses less digits than its factorization.

242515705521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171455.

The product of its (nonzero) digits is 140000, while the sum is 39.

The spelling of 242515705521 in words is "two hundred forty-two billion, five hundred fifteen million, seven hundred five thousand, five hundred twenty-one".