243130736466901 has 2 divisors, whose sum is σ = 243130736466902. Its totient is φ = 243130736466900.

The previous prime is 243130736466899. The next prime is 243130736467037. The reversal of 243130736466901 is 109664637031342.

243130736466901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221052249966276 + 22078486500625 = 14867826^2 + 4698775^2 .

It is a cyclic number.

It is not a de Polignac number, because 243130736466901 - 2¹ = 243130736466899 is a prime.

It is a super-2 number, since 2×243130736466901² (a number of 30 digits) contains 22 as substring.

Together with 243130736466899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243130736466001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121565368233450 + 121565368233451.

It is an arithmetic number, because the mean of its divisors is an integer number (121565368233451).

Almost surely, 2^{243130736466901} is an apocalyptic number.

It is an amenable number.

243130736466901 is a deficient number, since it is larger than the sum of its proper divisors (1).

243130736466901 is an equidigital number, since it uses as much as digits as its factorization.

243130736466901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11757312, while the sum is 55.

The spelling of 243130736466901 in words is "two hundred forty-three trillion, one hundred thirty billion, seven hundred thirty-six million, four hundred sixty-six thousand, nine hundred one".