243124030081 has 2 divisors, whose sum is σ = 243124030082. Its totient is φ = 243124030080.

The previous prime is 243124029991. The next prime is 243124030091. The reversal of 243124030081 is 180030421342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226156362481 + 16967667600 = 475559^2 + 130260^2 .

It is a cyclic number.

It is not a de Polignac number, because 243124030081 - 2¹¹ = 243124028033 is a prime.

It is a super-2 number, since 2×243124030081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243124030091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121562015040 + 121562015041.

It is an arithmetic number, because the mean of its divisors is an integer number (121562015041).

Almost surely, 2^243124030081 is an apocalyptic number.

It is an amenable number.

243124030081 is a deficient number, since it is larger than the sum of its proper divisors (1).

243124030081 is an equidigital number, since it uses as much as digits as its factorization.

243124030081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 28.

The spelling of 243124030081 in words is "two hundred forty-three billion, one hundred twenty-four million, thirty thousand, eighty-one".