242755919 has 4 divisors (see below), whose sum is σ = 277435344. Its totient is φ = 208076496.

The previous prime is 242755907. The next prime is 242755939. The reversal of 242755919 is 919557242.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 242755919 - 2⁸ = 242755663 is a prime.

It is a super-2 number, since 2×242755919² = 117860872419069122, 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 242755919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242755939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17339702 + ... + 17339715.

It is an arithmetic number, because the mean of its divisors is an integer number (69358836).

Almost surely, 2^242755919 is an apocalyptic number.

242755919 is a deficient number, since it is larger than the sum of its proper divisors (34679425).

242755919 is an equidigital number, since it uses as much as digits as its factorization.

242755919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34679424.

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

The square root of 242755919 is about 15580.6263994744. The cubic root of 242755919 is about 623.8161432021.

The spelling of 242755919 in words is "two hundred forty-two million, seven hundred fifty-five thousand, nine hundred nineteen".