243219404 has 24 divisors (see below), whose sum is σ = 441398160. Its totient is φ = 117126464.

The previous prime is 243219401. The next prime is 243219443. The reversal of 243219404 is 404912342.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (243219401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49022 + ... + 53754.

It is an arithmetic number, because the mean of its divisors is an integer number (18391590).

Almost surely, 2^243219404 is an apocalyptic number.

It is an amenable number.

243219404 is a deficient number, since it is larger than the sum of its proper divisors (198178756).

243219404 is a wasteful number, since it uses less digits than its factorization.

243219404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5209 (or 5207 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 243219404 is about 15595.4930669088. The cubic root of 243219404 is about 624.2129005887.

The spelling of 243219404 in words is "two hundred forty-three million, two hundred nineteen thousand, four hundred four".