42219155819 has 4 divisors (see below), whose sum is σ = 43200996696. Its totient is φ = 41237314944.

The previous prime is 42219155791. The next prime is 42219155831. The reversal of 42219155819 is 91855191224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42219155819 is a prime.

It is a super-2 number, since 2×42219155819² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42219155899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490920374 + ... + 490920459.

It is an arithmetic number, because the mean of its divisors is an integer number (10800249174).

Almost surely, 2^42219155819 is an apocalyptic number.

42219155819 is a deficient number, since it is larger than the sum of its proper divisors (981840877).

42219155819 is an equidigital number, since it uses as much as digits as its factorization.

42219155819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981840876.

The product of its digits is 259200, while the sum is 47.

The spelling of 42219155819 in words is "forty-two billion, two hundred nineteen million, one hundred fifty-five thousand, eight hundred nineteen".