243132404 has 12 divisors (see below), whose sum is σ = 440153700. Its totient is φ = 117374208.

The previous prime is 243132403. The next prime is 243132431. The reversal of 243132404 is 404231342.

It can be written as a sum of positive squares in 2 ways, for example, as 95023504 + 148108900 = 9748^2 + 12170^2 .

It is a super-2 number, since 2×243132404² = 118226731749638432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243132404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243132401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1047869 + ... + 1048100.

It is an arithmetic number, because the mean of its divisors is an integer number (36679475).

Almost surely, 2^243132404 is an apocalyptic number.

It is an amenable number.

243132404 is a deficient number, since it is larger than the sum of its proper divisors (197021296).

243132404 is a wasteful number, since it uses less digits than its factorization.

243132404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096002 (or 2096000 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 243132404 is about 15592.7035500583. The cubic root of 243132404 is about 624.1384643692.

Adding to 243132404 its reverse (404231342), we get a palindrome (647363746).

The spelling of 243132404 in words is "two hundred forty-three million, one hundred thirty-two thousand, four hundred four".