243232320131 has 2 divisors, whose sum is σ = 243232320132. Its totient is φ = 243232320130.

The previous prime is 243232320103. The next prime is 243232320169. The reversal of 243232320131 is 131023232342.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243232320131 - 2³⁴ = 226052450947 is a prime.

It is a super-2 number, since 2×243232320131² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243232320131.

It is not a weakly prime, because it can be changed into another prime (243232320101) 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 as a sum of consecutive naturals, namely, 121616160065 + 121616160066.

It is an arithmetic number, because the mean of its divisors is an integer number (121616160066).

Almost surely, 2^243232320131 is an apocalyptic number.

243232320131 is a deficient number, since it is larger than the sum of its proper divisors (1).

243232320131 is an equidigital number, since it uses as much as digits as its factorization.

243232320131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 243232320131 its reverse (131023232342), we get a palindrome (374255552473).

The spelling of 243232320131 in words is "two hundred forty-three billion, two hundred thirty-two million, three hundred twenty thousand, one hundred thirty-one".