243232552131 has 4 divisors (see below), whose sum is σ = 324310069512. Its totient is φ = 162155034752.

The previous prime is 243232552091. The next prime is 243232552141. The reversal of 243232552131 is 131255232342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243232552131 is a prime.

It is a super-2 number, since 2×243232552131² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243232552092 and 243232552101.

It is not an unprimeable number, because it can be changed into a prime (243232552141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40538758686 + ... + 40538758691.

It is an arithmetic number, because the mean of its divisors is an integer number (81077517378).

Almost surely, 2^243232552131 is an apocalyptic number.

243232552131 is a deficient number, since it is larger than the sum of its proper divisors (81077517381).

243232552131 is an equidigital number, since it uses as much as digits as its factorization.

243232552131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81077517380.

The product of its digits is 43200, while the sum is 33.

Adding to 243232552131 its reverse (131255232342), we get a palindrome (374487784473).

The spelling of 243232552131 in words is "two hundred forty-three billion, two hundred thirty-two million, five hundred fifty-two thousand, one hundred thirty-one".