242259191 has 4 divisors (see below), whose sum is σ = 242488584. Its totient is φ = 242029800.

The previous prime is 242259181. The next prime is 242259221. The reversal of 242259191 is 191952242.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242259191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242259181) 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, 113105 + ... + 115226.

It is an arithmetic number, because the mean of its divisors is an integer number (60622146).

Almost surely, 2^242259191 is an apocalyptic number.

242259191 is a deficient number, since it is larger than the sum of its proper divisors (229393).

242259191 is a wasteful number, since it uses less digits than its factorization.

242259191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229392.

The product of its digits is 12960, while the sum is 35.

The square root of 242259191 is about 15564.6776709317. The cubic root of 242259191 is about 623.3903677465.

The spelling of 242259191 in words is "two hundred forty-two million, two hundred fifty-nine thousand, one hundred ninety-one".