42518313 has 12 divisors (see below), whose sum is σ = 61729668. Its totient is φ = 28200480.

The previous prime is 42518261. The next prime is 42518317. The reversal of 42518313 is 31381524.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18429849 + 24088464 = 4293^2 + 4908^2 .

It is not a de Polignac number, because 42518313 - 2⁸ = 42518057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42518317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10218 + ... + 13763.

It is an arithmetic number, because the mean of its divisors is an integer number (5144139).

Almost surely, 2^42518313 is an apocalyptic number.

It is an amenable number.

42518313 is a deficient number, since it is larger than the sum of its proper divisors (19211355).

42518313 is a wasteful number, since it uses less digits than its factorization.

42518313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24184 (or 24181 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 42518313 is about 6520.6067969170. The cubic root of 42518313 is about 349.0267191362.

Adding to 42518313 its reverse (31381524), we get a palindrome (73899837).

The spelling of 42518313 in words is "forty-two million, five hundred eighteen thousand, three hundred thirteen".