242510305 has 4 divisors (see below), whose sum is σ = 291012372. Its totient is φ = 194008240.

The previous prime is 242510299. The next prime is 242510311. The reversal of 242510305 is 503015242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503015242 = 2 ⋅251507621.

It is an interprime number because it is at equal distance from previous prime (242510299) and next prime (242510311).

It can be written as a sum of positive squares in 2 ways, for example, as 36759969 + 205750336 = 6063^2 + 14344^2 .

It is not a de Polignac number, because 242510305 - 2⁵ = 242510273 is a prime.

It is a super-2 number, since 2×242510305² = 117622496062386050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24251026 + ... + 24251035.

It is an arithmetic number, because the mean of its divisors is an integer number (72753093).

Almost surely, 2^242510305 is an apocalyptic number.

It is an amenable number.

242510305 is a deficient number, since it is larger than the sum of its proper divisors (48502067).

242510305 is an equidigital number, since it uses as much as digits as its factorization.

242510305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48502066.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 242510305 is about 15572.7423724918. The cubic root of 242510305 is about 623.6056853317.

Adding to 242510305 its reverse (503015242), we get a palindrome (745525547).

The spelling of 242510305 in words is "two hundred forty-two million, five hundred ten thousand, three hundred five".