242505202139 has 2 divisors, whose sum is σ = 242505202140. Its totient is φ = 242505202138.

The previous prime is 242505202073. The next prime is 242505202151. The reversal of 242505202139 is 931202505242.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242505202139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 242505202099 and 242505202108.

It is not a weakly prime, because it can be changed into another prime (242505201139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121252601069 + 121252601070.

It is an arithmetic number, because the mean of its divisors is an integer number (121252601070).

Almost surely, 2^242505202139 is an apocalyptic number.

242505202139 is a deficient number, since it is larger than the sum of its proper divisors (1).

242505202139 is an equidigital number, since it uses as much as digits as its factorization.

242505202139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 242505202139 in words is "two hundred forty-two billion, five hundred five million, two hundred two thousand, one hundred thirty-nine".