42209213 has 8 divisors (see below), whose sum is σ = 43671096. Its totient is φ = 40768000.

The previous prime is 42209207. The next prime is 42209221. The reversal of 42209213 is 31290224.

42209213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 10252804 + 31956409 = 3202^2 + 5653^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42209213 - 2¹⁰ = 42208189 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 (42202213) 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, 956 + ... + 9237.

It is an arithmetic number, because the mean of its divisors is an integer number (5458887).

Almost surely, 2^42209213 is an apocalyptic number.

It is an amenable number.

42209213 is a deficient number, since it is larger than the sum of its proper divisors (1461883).

42209213 is a wasteful number, since it uses less digits than its factorization.

42209213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10335.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 42209213 is about 6496.8617808908. The cubic root of 42209213 is about 348.1788754294.

Adding to 42209213 its reverse (31290224), we get a palindrome (73499437).

The spelling of 42209213 in words is "forty-two million, two hundred nine thousand, two hundred thirteen".