243481385 has 16 divisors (see below), whose sum is σ = 341024256. Its totient is φ = 163405248.

The previous prime is 243481373. The next prime is 243481387. The reversal of 243481385 is 583184342.

It is a happy number.

243481385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 243481385 - 2⁴ = 243481369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243481387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72362 + ... + 75651.

It is an arithmetic number, because the mean of its divisors is an integer number (21314016).

Almost surely, 2^243481385 is an apocalyptic number.

It is an amenable number.

243481385 is a deficient number, since it is larger than the sum of its proper divisors (97542871).

243481385 is a wasteful number, since it uses less digits than its factorization.

243481385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148072.

The product of its digits is 92160, while the sum is 38.

The square root of 243481385 is about 15603.8900598537. The cubic root of 243481385 is about 624.4369414297.

The spelling of 243481385 in words is "two hundred forty-three million, four hundred eighty-one thousand, three hundred eighty-five".