42812815 has 8 divisors (see below), whose sum is σ = 52628688. Its totient is φ = 33414720.

The previous prime is 42812813. The next prime is 42812831. The reversal of 42812815 is 51821824.

42812815 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 42812815 - 2¹ = 42812813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42812813) 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, 104217 + ... + 104626.

It is an arithmetic number, because the mean of its divisors is an integer number (6578586).

Almost surely, 2^42812815 is an apocalyptic number.

42812815 is a deficient number, since it is larger than the sum of its proper divisors (9815873).

42812815 is a wasteful number, since it uses less digits than its factorization.

42812815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208889.

The product of its digits is 5120, while the sum is 31.

The square root of 42812815 is about 6543.1502351696. The cubic root of 42812815 is about 349.8307072430.

Subtracting 42812815 from its reverse (51821824), we obtain a palindrome (9009009).

The spelling of 42812815 in words is "forty-two million, eight hundred twelve thousand, eight hundred fifteen".