42540211 has 4 divisors (see below), whose sum is σ = 48617392. Its totient is φ = 36463032.

The previous prime is 42540191. The next prime is 42540227. The reversal of 42540211 is 11204524.

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 42540211 - 2¹⁹ = 42015923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42541211) 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, 3038580 + ... + 3038593.

It is an arithmetic number, because the mean of its divisors is an integer number (12154348).

Almost surely, 2^42540211 is an apocalyptic number.

42540211 is a deficient number, since it is larger than the sum of its proper divisors (6077181).

42540211 is an equidigital number, since it uses as much as digits as its factorization.

42540211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6077180.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 42540211 is about 6522.2857189792. The cubic root of 42540211 is about 349.0866280305.

Adding to 42540211 its reverse (11204524), we get a palindrome (53744735).

The spelling of 42540211 in words is "forty-two million, five hundred forty thousand, two hundred eleven".