242347081 has 4 divisors (see below), whose sum is σ = 242587332. Its totient is φ = 242106832.

The previous prime is 242347051. The next prime is 242347099. The reversal of 242347081 is 180743242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 180743242 = 2 ⋅90371621.

It can be written as a sum of positive squares in 2 ways, for example, as 36711481 + 205635600 = 6059^2 + 14340^2 .

It is a cyclic number.

It is not a de Polignac number, because 242347081 - 2¹⁵ = 242314313 is a prime.

It is a super-2 number, since 2×242347081² = 117464215338441122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242347051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118606 + ... + 120631.

It is an arithmetic number, because the mean of its divisors is an integer number (60646833).

Almost surely, 2^242347081 is an apocalyptic number.

It is an amenable number.

242347081 is a deficient number, since it is larger than the sum of its proper divisors (240251).

242347081 is a wasteful number, since it uses less digits than its factorization.

242347081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240250.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 242347081 is about 15567.5007949253. The cubic root of 242347081 is about 623.4657459048.

The spelling of 242347081 in words is "two hundred forty-two million, three hundred forty-seven thousand, eighty-one".