243121254463 has 2 divisors, whose sum is σ = 243121254464. Its totient is φ = 243121254462.

The previous prime is 243121254449. The next prime is 243121254469. The reversal of 243121254463 is 364452121342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243121254463 - 2¹³ = 243121246271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243121254469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560627231 + 121560627232.

It is an arithmetic number, because the mean of its divisors is an integer number (121560627232).

Almost surely, 2^243121254463 is an apocalyptic number.

243121254463 is a deficient number, since it is larger than the sum of its proper divisors (1).

243121254463 is an equidigital number, since it uses as much as digits as its factorization.

243121254463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 37.

The spelling of 243121254463 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred fifty-four thousand, four hundred sixty-three".