42808213 has 12 divisors (see below), whose sum is σ = 49937472. Its totient is φ = 36589560.

The previous prime is 42808187. The next prime is 42808219. The reversal of 42808213 is 31280824.

42808213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42808213 - 2²¹ = 40711061 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 (42808219) 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 11 ways as a sum of consecutive naturals, for example, 20106 + ... + 22132.

It is an arithmetic number, because the mean of its divisors is an integer number (4161456).

Almost surely, 2^42808213 is an apocalyptic number.

It is an amenable number.

42808213 is a deficient number, since it is larger than the sum of its proper divisors (7129259).

42808213 is a wasteful number, since it uses less digits than its factorization.

42808213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472 (or 2465 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 42808213 is about 6542.7985602493. The cubic root of 42808213 is about 349.8181722221.

It can be divided in two parts, 4280821 and 3, that added together give a palindrome (4280824).

The spelling of 42808213 in words is "forty-two million, eight hundred eight thousand, two hundred thirteen".