243140312 has 8 divisors (see below), whose sum is σ = 455888100. Its totient is φ = 121570152.

The previous prime is 243140279. The next prime is 243140333. The reversal of 243140312 is 213041342.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×243140312² = 118234422638914688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15196262 + ... + 15196277.

Almost surely, 2^243140312 is an apocalyptic number.

It is an amenable number.

243140312 is a deficient number, since it is larger than the sum of its proper divisors (212747788).

243140312 is a wasteful number, since it uses less digits than its factorization.

243140312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30392545 (or 30392541 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 243140312 is about 15592.9571281396. The cubic root of 243140312 is about 624.1452310985.

Adding to 243140312 its reverse (213041342), we get a palindrome (456181654).

The spelling of 243140312 in words is "two hundred forty-three million, one hundred forty thousand, three hundred twelve".