42548815 has 4 divisors (see below), whose sum is σ = 51058584. Its totient is φ = 34039048.

The previous prime is 42548813. The next prime is 42548839. The reversal of 42548815 is 51884524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42548815 - 2¹ = 42548813 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 (42548813) 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, 4254877 + ... + 4254886.

It is an arithmetic number, because the mean of its divisors is an integer number (12764646).

Almost surely, 2^42548815 is an apocalyptic number.

42548815 is a deficient number, since it is larger than the sum of its proper divisors (8509769).

42548815 is an equidigital number, since it uses as much as digits as its factorization.

42548815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8509768.

The product of its digits is 51200, while the sum is 37.

The square root of 42548815 is about 6522.9452703514. The cubic root of 42548815 is about 349.1101613637.

It can be divided in two parts, 425488 and 15, that added together give a triangular number (425503 = T₉₂₂).

The spelling of 42548815 in words is "forty-two million, five hundred forty-eight thousand, eight hundred fifteen".