242443109 has 2 divisors, whose sum is σ = 242443110. Its totient is φ = 242443108.

The previous prime is 242443099. The next prime is 242443163. The reversal of 242443109 is 901344242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177688900 + 64754209 = 13330^2 + 8047^2 .

It is a cyclic number.

It is not a de Polignac number, because 242443109 - 2¹⁶ = 242377573 is a prime.

It is a super-2 number, since 2×242443109² = 117557322203171762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242443169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121221554 + 121221555.

It is an arithmetic number, because the mean of its divisors is an integer number (121221555).

Almost surely, 2^242443109 is an apocalyptic number.

It is an amenable number.

242443109 is a deficient number, since it is larger than the sum of its proper divisors (1).

242443109 is an equidigital number, since it uses as much as digits as its factorization.

242443109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 242443109 is about 15570.5847353271. The cubic root of 242443109 is about 623.5480827231.

The spelling of 242443109 in words is "two hundred forty-two million, four hundred forty-three thousand, one hundred nine".