19982227 has 4 divisors (see below), whose sum is σ = 20023416. Its totient is φ = 19941040.

The previous prime is 19982213. The next prime is 19982251. The reversal of 19982227 is 72228991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72228991 = 409 ⋅176599.

It is a cyclic number.

It is not a de Polignac number, because 19982227 - 2⁷ = 19982099 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 19982227.

It is not an unprimeable number, because it can be changed into a prime (19982267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19858 + ... + 20839.

It is an arithmetic number, because the mean of its divisors is an integer number (5005854).

Almost surely, 2^19982227 is an apocalyptic number.

19982227 is a deficient number, since it is larger than the sum of its proper divisors (41189).

19982227 is an equidigital number, since it uses as much as digits as its factorization.

19982227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41188.

The product of its digits is 36288, while the sum is 40.

The square root of 19982227 is about 4470.1484315401. The cubic root of 19982227 is about 271.3613322564.

It can be divided in two parts, 1998 and 2227, that added together give a square (4225 = 65²).

The spelling of 19982227 in words is "nineteen million, nine hundred eighty-two thousand, two hundred twenty-seven".