243320131 has 2 divisors, whose sum is σ = 243320132. Its totient is φ = 243320130.

The previous prime is 243320113. The next prime is 243320141. The reversal of 243320131 is 131023342.

Together with previous prime (243320113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243320131 - 2¹¹ = 243318083 is a prime.

It is a super-2 number, since 2×243320131² = 118409372299714322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243320099 and 243320108.

It is not a weakly prime, because it can be changed into another prime (243320141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121660065 + 121660066.

It is an arithmetic number, because the mean of its divisors is an integer number (121660066).

Almost surely, 2^243320131 is an apocalyptic number.

243320131 is a deficient number, since it is larger than the sum of its proper divisors (1).

243320131 is an equidigital number, since it uses as much as digits as its factorization.

243320131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 243320131 is about 15598.7220950948. The cubic root of 243320131 is about 624.2990593053.

Adding to 243320131 its reverse (131023342), we get a palindrome (374343473).

The spelling of 243320131 in words is "two hundred forty-three million, three hundred twenty thousand, one hundred thirty-one".