242823161 has 4 divisors (see below), whose sum is σ = 277512192. Its totient is φ = 208134132.

The previous prime is 242823073. The next prime is 242823179. The reversal of 242823161 is 161328242.

It is a happy number.

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-242823161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (242823181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17344505 + ... + 17344518.

It is an arithmetic number, because the mean of its divisors is an integer number (69378048).

Almost surely, 2^242823161 is an apocalyptic number.

It is an amenable number.

242823161 is a deficient number, since it is larger than the sum of its proper divisors (34689031).

242823161 is an equidigital number, since it uses as much as digits as its factorization.

242823161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34689030.

The product of its digits is 4608, while the sum is 29.

The square root of 242823161 is about 15582.7841222292. The cubic root of 242823161 is about 623.8737357185.

The spelling of 242823161 in words is "two hundred forty-two million, eight hundred twenty-three thousand, one hundred sixty-one".