242910881 has 2 divisors, whose sum is σ = 242910882. Its totient is φ = 242910880.

The previous prime is 242910853. The next prime is 242910893. The reversal of 242910881 is 188019242.

242910881 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 can be written as a sum of positive squares in only one way, i.e., 225480256 + 17430625 = 15016^2 + 4175^2 .

It is a cyclic number.

It is not a de Polignac number, because 242910881 - 2¹⁰ = 242909857 is a prime.

It is a super-2 number, since 2×242910881² = 118011392216392322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (242910821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121455440 + 121455441.

It is an arithmetic number, because the mean of its divisors is an integer number (121455441).

Almost surely, 2^242910881 is an apocalyptic number.

It is an amenable number.

242910881 is a deficient number, since it is larger than the sum of its proper divisors (1).

242910881 is an equidigital number, since it uses as much as digits as its factorization.

242910881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 242910881 is about 15585.5985127296. The cubic root of 242910881 is about 623.9488515836.

The spelling of 242910881 in words is "two hundred forty-two million, nine hundred ten thousand, eight hundred eighty-one".