242217653 has 2 divisors, whose sum is σ = 242217654. Its totient is φ = 242217652.

The previous prime is 242217587. The next prime is 242217673. The reversal of 242217653 is 356712242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144168049 + 98049604 = 12007^2 + 9902^2 .

It is a cyclic number.

It is not a de Polignac number, because 242217653 - 2¹² = 242213557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242217673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121108826 + 121108827.

It is an arithmetic number, because the mean of its divisors is an integer number (121108827).

Almost surely, 2^242217653 is an apocalyptic number.

It is an amenable number.

242217653 is a deficient number, since it is larger than the sum of its proper divisors (1).

242217653 is an equidigital number, since it uses as much as digits as its factorization.

242217653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 32.

The square root of 242217653 is about 15563.3432462309. The cubic root of 242217653 is about 623.3547366674.

Adding to 242217653 its reverse (356712242), we get a palindrome (598929895).

The spelling of 242217653 in words is "two hundred forty-two million, two hundred seventeen thousand, six hundred fifty-three".