243181941 has 8 divisors (see below), whose sum is σ = 324327360. Its totient is φ = 162078912.

The previous prime is 243181937. The next prime is 243181951. The reversal of 243181941 is 149181342.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243181941 - 2² = 243181937 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243181951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6936 + ... + 23118.

It is an arithmetic number, because the mean of its divisors is an integer number (40540920).

Almost surely, 2^243181941 is an apocalyptic number.

It is an amenable number.

243181941 is a deficient number, since it is larger than the sum of its proper divisors (81145419).

243181941 is a wasteful number, since it uses less digits than its factorization.

243181941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21195.

The product of its digits is 6912, while the sum is 33.

The square root of 243181941 is about 15594.2919364747. The cubic root of 243181941 is about 624.1808498445.

The spelling of 243181941 in words is "two hundred forty-three million, one hundred eighty-one thousand, nine hundred forty-one".