242215663 has 4 divisors (see below), whose sum is σ = 245134008. Its totient is φ = 239297320.

The previous prime is 242215661. The next prime is 242215669. The reversal of 242215663 is 366512242.

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

It is a cyclic number.

It is not a de Polignac number, because 242215663 - 2¹ = 242215661 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 (242215661) 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, 1459048 + ... + 1459213.

It is an arithmetic number, because the mean of its divisors is an integer number (61283502).

Almost surely, 2^242215663 is an apocalyptic number.

242215663 is a deficient number, since it is larger than the sum of its proper divisors (2918345).

242215663 is an equidigital number, since it uses as much as digits as its factorization.

242215663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918344.

The product of its digits is 17280, while the sum is 31.

The square root of 242215663 is about 15563.2793138207. The cubic root of 242215663 is about 623.3530295536.

The spelling of 242215663 in words is "two hundred forty-two million, two hundred fifteen thousand, six hundred sixty-three".