242235561 has 4 divisors (see below), whose sum is σ = 322980752. Its totient is φ = 161490372.

The previous prime is 242235557. The next prime is 242235571. The reversal of 242235561 is 165532242.

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 not a de Polignac number, because 242235561 - 2² = 242235557 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 (242235551) 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, 40372591 + ... + 40372596.

It is an arithmetic number, because the mean of its divisors is an integer number (80745188).

Almost surely, 2^242235561 is an apocalyptic number.

It is an amenable number.

242235561 is a deficient number, since it is larger than the sum of its proper divisors (80745191).

242235561 is an equidigital number, since it uses as much as digits as its factorization.

242235561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80745190.

The product of its digits is 14400, while the sum is 30.

The square root of 242235561 is about 15563.9185618532. The cubic root of 242235561 is about 623.3700985556.

The spelling of 242235561 in words is "two hundred forty-two million, two hundred thirty-five thousand, five hundred sixty-one".