2042440313 has 4 divisors (see below), whose sum is σ = 2042554740. Its totient is φ = 2042325888.

The previous prime is 2042440303. The next prime is 2042440327. The reversal of 2042440313 is 3130442402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3130442402 = 2 ⋅1565221201.

It can be written as a sum of positive squares in 2 ways, for example, as 1115359609 + 927080704 = 33397^2 + 30448^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2042440313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2042440303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24020 + ... + 68277.

It is an arithmetic number, because the mean of its divisors is an integer number (510638685).

Almost surely, 2^2042440313 is an apocalyptic number.

It is an amenable number.

2042440313 is a deficient number, since it is larger than the sum of its proper divisors (114427).

2042440313 is an equidigital number, since it uses as much as digits as its factorization.

2042440313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114426.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 2042440313 is about 45193.3658073837. The cubic root of 2042440313 is about 1268.7706526183.

Adding to 2042440313 its reverse (3130442402), we get a palindrome (5172882715).

The spelling of 2042440313 in words is "two billion, forty-two million, four hundred forty thousand, three hundred thirteen".