243219948229 has 2 divisors, whose sum is σ = 243219948230. Its totient is φ = 243219948228.

The previous prime is 243219948163. The next prime is 243219948247. The reversal of 243219948229 is 922849912342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224464645729 + 18755302500 = 473777^2 + 136950^2 .

It is a cyclic number.

It is not a de Polignac number, because 243219948229 - 2⁹ = 243219947717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243219948229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243219948289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121609974114 + 121609974115.

It is an arithmetic number, because the mean of its divisors is an integer number (121609974115).

Almost surely, 2^243219948229 is an apocalyptic number.

It is an amenable number.

243219948229 is a deficient number, since it is larger than the sum of its proper divisors (1).

243219948229 is an equidigital number, since it uses as much as digits as its factorization.

243219948229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4478976, while the sum is 55.

The spelling of 243219948229 in words is "two hundred forty-three billion, two hundred nineteen million, nine hundred forty-eight thousand, two hundred twenty-nine".