242311145 has 4 divisors (see below), whose sum is σ = 290773380. Its totient is φ = 193848912.

The previous prime is 242311117. The next prime is 242311151. The reversal of 242311145 is 541113242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541113242 = 2 ⋅270556621.

It can be written as a sum of positive squares in 2 ways, for example, as 45414121 + 196897024 = 6739^2 + 14032^2 .

It is a cyclic number.

It is not a de Polignac number, because 242311145 - 2¹⁸ = 242049001 is a prime.

It is a super-2 number, since 2×242311145² = 117429381982422050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 242311145.

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, 24231110 + ... + 24231119.

It is an arithmetic number, because the mean of its divisors is an integer number (72693345).

Almost surely, 2^242311145 is an apocalyptic number.

It is an amenable number.

242311145 is a deficient number, since it is larger than the sum of its proper divisors (48462235).

242311145 is an equidigital number, since it uses as much as digits as its factorization.

242311145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48462234.

The product of its digits is 960, while the sum is 23.

The square root of 242311145 is about 15566.3465527400. The cubic root of 242311145 is about 623.4349278835.

Adding to 242311145 its reverse (541113242), we get a palindrome (783424387).

The spelling of 242311145 in words is "two hundred forty-two million, three hundred eleven thousand, one hundred forty-five".