42208315 has 4 divisors (see below), whose sum is σ = 50649984. Its totient is φ = 33766648.

The previous prime is 42208301. The next prime is 42208319. The reversal of 42208315 is 51380224.

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 42208315 - 2¹¹ = 42206267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42208315.

It is not an unprimeable number, because it can be changed into a prime (42208319) 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, 4220827 + ... + 4220836.

It is an arithmetic number, because the mean of its divisors is an integer number (12662496).

Almost surely, 2^42208315 is an apocalyptic number.

42208315 is a deficient number, since it is larger than the sum of its proper divisors (8441669).

42208315 is an equidigital number, since it uses as much as digits as its factorization.

42208315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8441668.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 42208315 is about 6496.7926702335. The cubic root of 42208315 is about 348.1764062462.

Adding to 42208315 its reverse (51380224), we get a palindrome (93588539).

The spelling of 42208315 in words is "forty-two million, two hundred eight thousand, three hundred fifteen".