242188811 has 2 divisors, whose sum is σ = 242188812. Its totient is φ = 242188810.

The previous prime is 242188759. The next prime is 242188841. The reversal of 242188811 is 118881242.

It is a happy number.

242188811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242188811 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (242188841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121094405 + 121094406.

It is an arithmetic number, because the mean of its divisors is an integer number (121094406).

Almost surely, 2^242188811 is an apocalyptic number.

242188811 is a deficient number, since it is larger than the sum of its proper divisors (1).

242188811 is an equidigital number, since it uses as much as digits as its factorization.

242188811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8192, while the sum is 35.

The square root of 242188811 is about 15562.4166182505. The cubic root of 242188811 is about 623.3299937544.

The spelling of 242188811 in words is "two hundred forty-two million, one hundred eighty-eight thousand, eight hundred eleven".