242153709 has 16 divisors (see below), whose sum is σ = 370101888. Its totient is φ = 137958912.

The previous prime is 242153701. The next prime is 242153753. The reversal of 242153709 is 907351242.

It is not a de Polignac number, because 242153709 - 2³ = 242153701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242153709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242153701) 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 15 ways as a sum of consecutive naturals, for example, 10032 + ... + 24185.

It is an arithmetic number, because the mean of its divisors is an integer number (23131368).

Almost surely, 2^242153709 is an apocalyptic number.

It is an amenable number.

242153709 is a deficient number, since it is larger than the sum of its proper divisors (127948179).

242153709 is a wasteful number, since it uses less digits than its factorization.

242153709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34564.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 242153709 is about 15561.2887962405. The cubic root of 242153709 is about 623.2998778756.

The spelling of 242153709 in words is "two hundred forty-two million, one hundred fifty-three thousand, seven hundred nine".