242139594509 has 4 divisors (see below), whose sum is σ = 242336297280. Its totient is φ = 241942891740.

The previous prime is 242139594493. The next prime is 242139594607. The reversal of 242139594509 is 905495931242.

242139594509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 242139594509 - 2⁴ = 242139594493 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 (242139594709) 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, 98349539 + ... + 98352000.

It is an arithmetic number, because the mean of its divisors is an integer number (60584074320).

Almost surely, 2^242139594509 is an apocalyptic number.

It is an amenable number.

242139594509 is a deficient number, since it is larger than the sum of its proper divisors (196702771).

242139594509 is a wasteful number, since it uses less digits than its factorization.

242139594509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196702770.

The product of its (nonzero) digits is 3499200, while the sum is 53.

The spelling of 242139594509 in words is "two hundred forty-two billion, one hundred thirty-nine million, five hundred ninety-four thousand, five hundred nine".