243210145349 has 2 divisors, whose sum is σ = 243210145350. Its totient is φ = 243210145348.

The previous prime is 243210145319. The next prime is 243210145357. The reversal of 243210145349 is 943541012342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190318425025 + 52891720324 = 436255^2 + 229982^2 .

It is a cyclic number.

It is not a de Polignac number, because 243210145349 - 2²⁴ = 243193368133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243210145309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121605072674 + 121605072675.

It is an arithmetic number, because the mean of its divisors is an integer number (121605072675).

Almost surely, 2^243210145349 is an apocalyptic number.

It is an amenable number.

243210145349 is a deficient number, since it is larger than the sum of its proper divisors (1).

243210145349 is an equidigital number, since it uses as much as digits as its factorization.

243210145349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 243210145349 in words is "two hundred forty-three billion, two hundred ten million, one hundred forty-five thousand, three hundred forty-nine".