243344132261 has 2 divisors, whose sum is σ = 243344132262. Its totient is φ = 243344132260.

The previous prime is 243344132219. The next prime is 243344132303. The reversal of 243344132261 is 162231443342.

It is a balanced prime because it is at equal distance from previous prime (243344132219) and next prime (243344132303).

It can be written as a sum of positive squares in only one way, i.e., 236980081636 + 6364050625 = 486806^2 + 79775^2 .

It is a cyclic number.

It is not a de Polignac number, because 243344132261 - 2²² = 243339937957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243344134261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121672066130 + 121672066131.

It is an arithmetic number, because the mean of its divisors is an integer number (121672066131).

Almost surely, 2^243344132261 is an apocalyptic number.

It is an amenable number.

243344132261 is a deficient number, since it is larger than the sum of its proper divisors (1).

243344132261 is an equidigital number, since it uses as much as digits as its factorization.

243344132261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 35.

The spelling of 243344132261 in words is "two hundred forty-three billion, three hundred forty-four million, one hundred thirty-two thousand, two hundred sixty-one".