243131442985 has 8 divisors (see below), whose sum is σ = 296702778240. Its totient is φ = 191208456624.

The previous prime is 243131442977. The next prime is 243131443031. The reversal of 243131442985 is 589244131342.

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

It is a cyclic number.

It is not a de Polignac number, because 243131442985 - 2³ = 243131442977 is a prime.

It is a super-2 number, since 2×243131442985² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412086897 + ... + 412087486.

It is an arithmetic number, because the mean of its divisors is an integer number (37087847280).

Almost surely, 2^243131442985 is an apocalyptic number.

It is an amenable number.

243131442985 is a deficient number, since it is larger than the sum of its proper divisors (53571335255).

243131442985 is an equidigital number, since it uses as much as digits as its factorization.

243131442985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824174447.

The product of its digits is 829440, while the sum is 46.

The spelling of 243131442985 in words is "two hundred forty-three billion, one hundred thirty-one million, four hundred forty-two thousand, nine hundred eighty-five".