42116815 has 8 divisors (see below), whose sum is σ = 54427968. Its totient is φ = 31101600.

The previous prime is 42116813. The next prime is 42116843. The reversal of 42116815 is 51861124.

42116815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42116815 - 2¹ = 42116813 is a prime.

It is a super-2 number, since 2×42116815² = 3547652211488450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42116813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323911 + ... + 324040.

It is an arithmetic number, because the mean of its divisors is an integer number (6803496).

Almost surely, 2^42116815 is an apocalyptic number.

42116815 is a deficient number, since it is larger than the sum of its proper divisors (12311153).

42116815 is a wasteful number, since it uses less digits than its factorization.

42116815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647969.

The product of its digits is 1920, while the sum is 28.

The square root of 42116815 is about 6489.7469134012. The cubic root of 42116815 is about 347.9246297116.

Adding to 42116815 its reverse (51861124), we get a palindrome (93977939).

It can be divided in two parts, 4211 and 6815, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 42116815 in words is "forty-two million, one hundred sixteen thousand, eight hundred fifteen".