242442219997 has 2 divisors, whose sum is σ = 242442219998. Its totient is φ = 242442219996.

The previous prime is 242442219961. The next prime is 242442220043. The reversal of 242442219997 is 799912244242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197557136676 + 44885083321 = 444474^2 + 211861^2 .

It is a cyclic number.

It is not a de Polignac number, because 242442219997 - 2²³ = 242433831389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242442219937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121221109998 + 121221109999.

It is an arithmetic number, because the mean of its divisors is an integer number (121221109999).

Almost surely, 2^242442219997 is an apocalyptic number.

It is an amenable number.

242442219997 is a deficient number, since it is larger than the sum of its proper divisors (1).

242442219997 is an equidigital number, since it uses as much as digits as its factorization.

242442219997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 55.

The spelling of 242442219997 in words is "two hundred forty-two billion, four hundred forty-two million, two hundred nineteen thousand, nine hundred ninety-seven".