242515799 has 2 divisors, whose sum is σ = 242515800. Its totient is φ = 242515798.

The previous prime is 242515789. The next prime is 242515831. The reversal of 242515799 is 997515242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242515799 - 2²⁰ = 241467223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242515729) 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 as a sum of consecutive naturals, namely, 121257899 + 121257900.

It is an arithmetic number, because the mean of its divisors is an integer number (121257900).

Almost surely, 2^242515799 is an apocalyptic number.

242515799 is a deficient number, since it is larger than the sum of its proper divisors (1).

242515799 is an equidigital number, since it uses as much as digits as its factorization.

242515799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 44.

The square root of 242515799 is about 15572.9187694536. The cubic root of 242515799 is about 623.6103944976.

The spelling of 242515799 in words is "two hundred forty-two million, five hundred fifteen thousand, seven hundred ninety-nine".