243481554 has 24 divisors (see below), whose sum is σ = 536487120. Its totient is φ = 79784568.

The previous prime is 243481547. The next prime is 243481583. The reversal of 243481554 is 455184342.

It is a happy number.

243481554 is a `hidden beast` number, since 24 + 3 + 4 + 81 + 554 = 666.

243481554 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113572 + ... + 115695.

It is an arithmetic number, because the mean of its divisors is an integer number (22353630).

Almost surely, 2^243481554 is an apocalyptic number.

243481554 is an abundant number, since it is smaller than the sum of its proper divisors (293005566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243481554 is a wasteful number, since it uses less digits than its factorization.

243481554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229334 (or 229331 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 243481554 is about 15603.8954751690. The cubic root of 243481554 is about 624.4370859032.

The spelling of 243481554 in words is "two hundred forty-three million, four hundred eighty-one thousand, five hundred fifty-four".