242549999999 has 2 divisors, whose sum is σ = 242550000000. Its totient is φ = 242549999998.

The previous prime is 242549999977. The next prime is 242550000023. The reversal of 242549999999 is 999999945242.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242549999999 - 2⁸ = 242549999743 is a prime.

It is a Sophie Germain prime.

242549999999 is a modest number, since divided by 999999 gives 242549 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242549999599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121274999999 + 121275000000.

It is an arithmetic number, because the mean of its divisors is an integer number (121275000000).

Almost surely, 2^242549999999 is an apocalyptic number.

242549999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

242549999999 is an equidigital number, since it uses as much as digits as its factorization.

242549999999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1530550080, while the sum is 80.

The spelling of 242549999999 in words is "two hundred forty-two billion, five hundred forty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".