243139333313 has 2 divisors, whose sum is σ = 243139333314. Its totient is φ = 243139333312.

The previous prime is 243139333259. The next prime is 243139333319. The reversal of 243139333313 is 313333931342.

243139333313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238624434064 + 4514899249 = 488492^2 + 67193^2 .

It is a cyclic number.

It is not a de Polignac number, because 243139333313 - 2¹⁴ = 243139316929 is a prime.

It is a super-2 number, since 2×243139333313² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243139333319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121569666656 + 121569666657.

It is an arithmetic number, because the mean of its divisors is an integer number (121569666657).

Almost surely, 2^243139333313 is an apocalyptic number.

It is an amenable number.

243139333313 is a deficient number, since it is larger than the sum of its proper divisors (1).

243139333313 is an equidigital number, since it uses as much as digits as its factorization.

243139333313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 38.

The spelling of 243139333313 in words is "two hundred forty-three billion, one hundred thirty-nine million, three hundred thirty-three thousand, three hundred thirteen".