243378285 has 16 divisors (see below), whose sum is σ = 391741056. Its totient is φ = 129023168.

The previous prime is 243378283. The next prime is 243378287. The reversal of 243378285 is 582873342.

It is an interprime number because it is at equal distance from previous prime (243378283) and next prime (243378287).

It is a cyclic number.

It is not a de Polignac number, because 243378285 - 2¹ = 243378283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243378283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46074 + ... + 51083.

It is an arithmetic number, because the mean of its divisors is an integer number (24483816).

Almost surely, 2^243378285 is an apocalyptic number.

It is an amenable number.

243378285 is a deficient number, since it is larger than the sum of its proper divisors (148362771).

243378285 is a wasteful number, since it uses less digits than its factorization.

243378285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97332.

The product of its digits is 322560, while the sum is 42.

The square root of 243378285 is about 15600.5860466843. The cubic root of 243378285 is about 624.3487915865.

The spelling of 243378285 in words is "two hundred forty-three million, three hundred seventy-eight thousand, two hundred eighty-five".