242263561 has 2 divisors, whose sum is σ = 242263562. Its totient is φ = 242263560.

The previous prime is 242263493. The next prime is 242263579. The reversal of 242263561 is 165362242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240250000 + 2013561 = 15500^2 + 1419^2 .

It is a cyclic number.

It is not a de Polignac number, because 242263561 - 2¹⁷ = 242132489 is a prime.

It is not a weakly prime, because it can be changed into another prime (242263061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121131780 + 121131781.

It is an arithmetic number, because the mean of its divisors is an integer number (121131781).

Almost surely, 2^242263561 is an apocalyptic number.

It is an amenable number.

242263561 is a deficient number, since it is larger than the sum of its proper divisors (1).

242263561 is an equidigital number, since it uses as much as digits as its factorization.

242263561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 31.

The square root of 242263561 is about 15564.8180522613. The cubic root of 242263561 is about 623.3941160729.

The spelling of 242263561 in words is "two hundred forty-two million, two hundred sixty-three thousand, five hundred sixty-one".