2019221473 has 4 divisors (see below), whose sum is σ = 2062183680. Its totient is φ = 1976259268.

The previous prime is 2019221453. The next prime is 2019221489. The reversal of 2019221473 is 3741229102.

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 a cyclic number.

It is not a de Polignac number, because 2019221473 - 2⁵ = 2019221441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2019221443) 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, 21481033 + ... + 21481126.

It is an arithmetic number, because the mean of its divisors is an integer number (515545920).

Almost surely, 2^2019221473 is an apocalyptic number.

It is an amenable number.

2019221473 is a deficient number, since it is larger than the sum of its proper divisors (42962207).

2019221473 is an equidigital number, since it uses as much as digits as its factorization.

2019221473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42962206.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 2019221473 is about 44935.7482746198. The cubic root of 2019221473 is about 1263.9444444368.

The spelling of 2019221473 in words is "two billion, nineteen million, two hundred twenty-one thousand, four hundred seventy-three".