242228309 has 4 divisors (see below), whose sum is σ = 242398080. Its totient is φ = 242058540.

The previous prime is 242228297. The next prime is 242228333. The reversal of 242228309 is 903822242.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242228309 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 (242228339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82727 + ... + 85604.

It is an arithmetic number, because the mean of its divisors is an integer number (60599520).

Almost surely, 2^242228309 is an apocalyptic number.

It is an amenable number.

242228309 is a deficient number, since it is larger than the sum of its proper divisors (169771).

242228309 is a wasteful number, since it uses less digits than its factorization.

242228309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169770.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 242228309 is about 15563.6855853618. The cubic root of 242228309 is about 623.3638777169.

The spelling of 242228309 in words is "two hundred forty-two million, two hundred twenty-eight thousand, three hundred nine".