242240549 has 2 divisors, whose sum is σ = 242240550. Its totient is φ = 242240548.

The previous prime is 242240539. The next prime is 242240561. The reversal of 242240549 is 945042242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129732100 + 112508449 = 11390^2 + 10607^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242240549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242240539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121120274 + 121120275.

It is an arithmetic number, because the mean of its divisors is an integer number (121120275).

Almost surely, 2^242240549 is an apocalyptic number.

It is an amenable number.

242240549 is a deficient number, since it is larger than the sum of its proper divisors (1).

242240549 is an equidigital number, since it uses as much as digits as its factorization.

242240549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 242240549 is about 15564.0788034499. The cubic root of 242240549 is about 623.3743772402.

The spelling of 242240549 in words is "two hundred forty-two million, two hundred forty thousand, five hundred forty-nine".