242101309 has 16 divisors (see below), whose sum is σ = 258192000. Its totient is φ = 226610496.

The previous prime is 242101291. The next prime is 242101313. The reversal of 242101309 is 903101242.

It is a cyclic number.

It is not a de Polignac number, because 242101309 - 2⁹ = 242100797 is a prime.

It is a super-2 number, since 2×242101309² = 117226087639026962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242101309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242101339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185152 + ... + 186454.

It is an arithmetic number, because the mean of its divisors is an integer number (16137000).

Almost surely, 2^242101309 is an apocalyptic number.

242101309 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

242101309 is a deficient number, since it is larger than the sum of its proper divisors (16090691).

242101309 is a wasteful number, since it uses less digits than its factorization.

242101309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 242101309 is about 15559.6050399745. The cubic root of 242101309 is about 623.2549157042.

The spelling of 242101309 in words is "two hundred forty-two million, one hundred one thousand, three hundred nine".