238242191 has 4 divisors (see below), whose sum is σ = 259900584. Its totient is φ = 216583800.

The previous prime is 238242181. The next prime is 238242217. The reversal of 238242191 is 191242832.

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 238242191 - 2²² = 234047887 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 (238242101) 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, 10829180 + ... + 10829201.

It is an arithmetic number, because the mean of its divisors is an integer number (64975146).

Almost surely, 2^238242191 is an apocalyptic number.

238242191 is a deficient number, since it is larger than the sum of its proper divisors (21658393).

238242191 is a wasteful number, since it uses less digits than its factorization.

238242191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21658392.

The product of its digits is 6912, while the sum is 32.

The square root of 238242191 is about 15435.0960800379. The cubic root of 238242191 is about 619.9255815986.

The spelling of 238242191 in words is "two hundred thirty-eight million, two hundred forty-two thousand, one hundred ninety-one".