19223227 has 4 divisors (see below), whose sum is σ = 19240920. Its totient is φ = 19205536.

The previous prime is 19223177. The next prime is 19223233. The reversal of 19223227 is 72232291.

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-19223227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19223195 and 19223204.

It is not an unprimeable number, because it can be changed into a prime (19223287) 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, 7102 + ... + 9427.

It is an arithmetic number, because the mean of its divisors is an integer number (4810230).

Almost surely, 2^19223227 is an apocalyptic number.

19223227 is a deficient number, since it is larger than the sum of its proper divisors (17693).

19223227 is a wasteful number, since it uses less digits than its factorization.

19223227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17692.

The product of its digits is 3024, while the sum is 28.

The square root of 19223227 is about 4384.4300655844. The cubic root of 19223227 is about 267.8811151252.

The spelling of 19223227 in words is "nineteen million, two hundred twenty-three thousand, two hundred twenty-seven".