42220244191 has 4 divisors (see below), whose sum is σ = 43582187584. Its totient is φ = 40858300800.

The previous prime is 42220244179. The next prime is 42220244201. The reversal of 42220244191 is 19144202224.

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 42220244191 - 2⁵ = 42220244159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 1361943361 = 42220244191 / (4 + 2 + 2 + 2 + 0 + 2 + 4 + 4 + 1 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42220244161) 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, 680971650 + ... + 680971711.

It is an arithmetic number, because the mean of its divisors is an integer number (10895546896).

Almost surely, 2^42220244191 is an apocalyptic number.

42220244191 is a deficient number, since it is larger than the sum of its proper divisors (1361943393).

42220244191 is a wasteful number, since it uses less digits than its factorization.

42220244191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361943392.

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 42220244191 in words is "forty-two billion, two hundred twenty million, two hundred forty-four thousand, one hundred ninety-one".