242564019 has 4 divisors (see below), whose sum is σ = 323418696. Its totient is φ = 161709344.

The previous prime is 242564017. The next prime is 242564029. The reversal of 242564019 is 910465242.

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 242564019 - 2¹ = 242564017 is a prime.

It is a super-2 number, since 2×242564019² = 117674606626864722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (242564011) 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, 40427334 + ... + 40427339.

It is an arithmetic number, because the mean of its divisors is an integer number (80854674).

Almost surely, 2^242564019 is an apocalyptic number.

242564019 is a deficient number, since it is larger than the sum of its proper divisors (80854677).

242564019 is an equidigital number, since it uses as much as digits as its factorization.

242564019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80854676.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 242564019 is about 15574.4668929630. The cubic root of 242564019 is about 623.6517230771.

The spelling of 242564019 in words is "two hundred forty-two million, five hundred sixty-four thousand, nineteen".