42220541 has 4 divisors (see below), whose sum is σ = 46058784. Its totient is φ = 38382300.

The previous prime is 42220517. The next prime is 42220559. The reversal of 42220541 is 14502224.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42220541 - 2²² = 38026237 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 (42220561) 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, 1919105 + ... + 1919126.

It is an arithmetic number, because the mean of its divisors is an integer number (11514696).

Almost surely, 2^42220541 is an apocalyptic number.

It is an amenable number.

42220541 is a deficient number, since it is larger than the sum of its proper divisors (3838243).

42220541 is a wasteful number, since it uses less digits than its factorization.

42220541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3838242.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 42220541 is about 6497.7335279311. The cubic root of 42220541 is about 348.2100204270.

Adding to 42220541 its reverse (14502224), we get a palindrome (56722765).

The spelling of 42220541 in words is "forty-two million, two hundred twenty thousand, five hundred forty-one".