42209271 has 18 divisors (see below), whose sum is σ = 66022008. Its totient is φ = 25974000.

The previous prime is 42209227. The next prime is 42209303. The reversal of 42209271 is 17290224.

It is not a de Polignac number, because 42209271 - 2⁶ = 42209207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42209221) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12355 + ... + 15396.

Almost surely, 2^42209271 is an apocalyptic number.

42209271 is a deficient number, since it is larger than the sum of its proper divisors (23812737).

42209271 is a wasteful number, since it uses less digits than its factorization.

42209271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27783 (or 27767 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 42209271 is about 6496.8662445828. The cubic root of 42209271 is about 348.1790349078.

Adding to 42209271 its reverse (17290224), we get a palindrome (59499495).

The spelling of 42209271 in words is "forty-two million, two hundred nine thousand, two hundred seventy-one".