242215697 has 4 divisors (see below), whose sum is σ = 242259696. Its totient is φ = 242171700.

The previous prime is 242215669. The next prime is 242215703. The reversal of 242215697 is 796512242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 796512242 = 2 ⋅398256121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242215697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242215697.

It is not an unprimeable number, because it can be changed into a prime (242215607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12323 + ... + 25224.

It is an arithmetic number, because the mean of its divisors is an integer number (60564924).

Almost surely, 2^242215697 is an apocalyptic number.

It is an amenable number.

242215697 is a deficient number, since it is larger than the sum of its proper divisors (43999).

242215697 is an equidigital number, since it uses as much as digits as its factorization.

242215697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43998.

The product of its digits is 60480, while the sum is 38.

The square root of 242215697 is about 15563.2804061355. The cubic root of 242215697 is about 623.3530587204.

The spelling of 242215697 in words is "two hundred forty-two million, two hundred fifteen thousand, six hundred ninety-seven".