243120071 has 4 divisors (see below), whose sum is σ = 243152112. Its totient is φ = 243088032.

The previous prime is 243120047. The next prime is 243120083. The reversal of 243120071 is 170021342.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243120071 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 (243120041) 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, 2495 + ... + 22191.

It is an arithmetic number, because the mean of its divisors is an integer number (60788028).

Almost surely, 2^243120071 is an apocalyptic number.

243120071 is a deficient number, since it is larger than the sum of its proper divisors (32041).

243120071 is a wasteful number, since it uses less digits than its factorization.

243120071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32040.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 243120071 is about 15592.3080716102. The cubic root of 243120071 is about 624.1279109564.

The spelling of 243120071 in words is "two hundred forty-three million, one hundred twenty thousand, seventy-one".