243180085 has 4 divisors (see below), whose sum is σ = 291816108. Its totient is φ = 194544064.

The previous prime is 243180079. The next prime is 243180103. The reversal of 243180085 is 580081342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 580081342 = 2 ⋅290040671.

It can be written as a sum of positive squares in 2 ways, for example, as 125305636 + 117874449 = 11194^2 + 10857^2 .

It is a cyclic number.

It is not a de Polignac number, because 243180085 - 2¹⁷ = 243049013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24318004 + ... + 24318013.

It is an arithmetic number, because the mean of its divisors is an integer number (72954027).

Almost surely, 2^243180085 is an apocalyptic number.

It is an amenable number.

243180085 is a deficient number, since it is larger than the sum of its proper divisors (48636023).

243180085 is an equidigital number, since it uses as much as digits as its factorization.

243180085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48636022.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 243180085 is about 15594.2324274073. The cubic root of 243180085 is about 624.1792618941.

The spelling of 243180085 in words is "two hundred forty-three million, one hundred eighty thousand, eighty-five".