243243542530 has 16 divisors (see below), whose sum is σ = 448517362104. Its totient is φ = 94924309120.

The previous prime is 243243542519. The next prime is 243243542551. The reversal of 243243542530 is 35245342342.

It can be written as a sum of positive squares in 4 ways, for example, as 69196880809 + 174046661721 = 263053^2 + 417189^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 243243542530.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296638057 + ... + 296638876.

Almost surely, 2^243243542530 is an apocalyptic number.

243243542530 is a deficient number, since it is larger than the sum of its proper divisors (205273819574).

243243542530 is a wasteful number, since it uses less digits than its factorization.

243243542530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593276981.

The product of its (nonzero) digits is 345600, while the sum is 37.

Adding to 243243542530 its reverse (35245342342), we get a palindrome (278488884872).

The spelling of 243243542530 in words is "two hundred forty-three billion, two hundred forty-three million, five hundred forty-two thousand, five hundred thirty".