242042513 has 4 divisors (see below), whose sum is σ = 249850368. Its totient is φ = 234234660.

The previous prime is 242042509. The next prime is 242042551. The reversal of 242042513 is 315240242.

It is a happy number.

242042513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 315240242 = 2 ⋅157620121.

It is a cyclic number.

It is not a de Polignac number, because 242042513 - 2² = 242042509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242042113) 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, 3903881 + ... + 3903942.

It is an arithmetic number, because the mean of its divisors is an integer number (62462592).

Almost surely, 2^242042513 is an apocalyptic number.

It is an amenable number.

242042513 is a deficient number, since it is larger than the sum of its proper divisors (7807855).

242042513 is an equidigital number, since it uses as much as digits as its factorization.

242042513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7807854.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 242042513 is about 15557.7155456706. The cubic root of 242042513 is about 623.2044576775.

Adding to 242042513 its reverse (315240242), we get a palindrome (557282755).

The spelling of 242042513 in words is "two hundred forty-two million, forty-two thousand, five hundred thirteen".