243132521323 has 16 divisors (see below), whose sum is σ = 258598725120. Its totient is φ = 227796811776.

The previous prime is 243132521321. The next prime is 243132521327. The reversal of 243132521323 is 323125231342.

It is a cyclic number.

It is not a de Polignac number, because 243132521323 - 2¹ = 243132521321 is a prime.

It is a super-2 number, since 2×243132521323² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243132521321) 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, 7275190 + ... + 7308532.

It is an arithmetic number, because the mean of its divisors is an integer number (16162420320).

Almost surely, 2^243132521323 is an apocalyptic number.

243132521323 is a deficient number, since it is larger than the sum of its proper divisors (15466203797).

243132521323 is a wasteful number, since it uses less digits than its factorization.

243132521323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35286.

The product of its digits is 25920, while the sum is 31.

Adding to 243132521323 its reverse (323125231342), we get a palindrome (566257752665).

The spelling of 243132521323 in words is "two hundred forty-three billion, one hundred thirty-two million, five hundred twenty-one thousand, three hundred twenty-three".