42040219 has 4 divisors (see below), whose sum is σ = 45274096. Its totient is φ = 38806344.

The previous prime is 42040199. The next prime is 42040249. The reversal of 42040219 is 91204024.

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 42040219 - 2⁹ = 42039707 is a prime.

It is a super-2 number, since 2×42040219² = 3534760027135922, which contains 22 as substring.

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 42040219.

It is not an unprimeable number, because it can be changed into a prime (42040249) 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, 1616919 + ... + 1616944.

It is an arithmetic number, because the mean of its divisors is an integer number (11318524).

Almost surely, 2^42040219 is an apocalyptic number.

42040219 is a deficient number, since it is larger than the sum of its proper divisors (3233877).

42040219 is a wasteful number, since it uses less digits than its factorization.

42040219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233876.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 42040219 is about 6483.8429191337. The cubic root of 42040219 is about 347.7135833098.

The spelling of 42040219 in words is "forty-two million, forty thousand, two hundred nineteen".