242555219 has 2 divisors, whose sum is σ = 242555220. Its totient is φ = 242555218.

The previous prime is 242555213. The next prime is 242555231. The reversal of 242555219 is 912555242.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242555219 is a prime.

It is a super-2 number, since 2×242555219² = 117666068528275922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (242555213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121277609 + 121277610.

It is an arithmetic number, because the mean of its divisors is an integer number (121277610).

Almost surely, 2^242555219 is an apocalyptic number.

242555219 is a deficient number, since it is larger than the sum of its proper divisors (1).

242555219 is an equidigital number, since it uses as much as digits as its factorization.

242555219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000, while the sum is 35.

The square root of 242555219 is about 15574.1843767178. The cubic root of 242555219 is about 623.6441811485.

The spelling of 242555219 in words is "two hundred forty-two million, five hundred fifty-five thousand, two hundred nineteen".