242311520503 has 4 divisors (see below), whose sum is σ = 260950868248. Its totient is φ = 223672172760.

The previous prime is 242311520483. The next prime is 242311520519. The reversal of 242311520503 is 305025113242.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242311520503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242311520533) 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, 9319673853 + ... + 9319673878.

It is an arithmetic number, because the mean of its divisors is an integer number (65237717062).

Almost surely, 2^242311520503 is an apocalyptic number.

242311520503 is a deficient number, since it is larger than the sum of its proper divisors (18639347745).

242311520503 is a wasteful number, since it uses less digits than its factorization.

242311520503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18639347744.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 242311520503 its reverse (305025113242), we get a palindrome (547336633745).

The spelling of 242311520503 in words is "two hundred forty-two billion, three hundred eleven million, five hundred twenty thousand, five hundred three".