428267219 has 2 divisors, whose sum is σ = 428267220. Its totient is φ = 428267218.

The previous prime is 428267183. The next prime is 428267221. The reversal of 428267219 is 912762824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428267219 - 2⁸ = 428266963 is a prime.

It is a super-2 number, since 2×428267219² = 366825621739987922, which contains 22 as substring.

Together with 428267221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (428267419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214133609 + 214133610.

It is an arithmetic number, because the mean of its divisors is an integer number (214133610).

Almost surely, 2^428267219 is an apocalyptic number.

428267219 is a deficient number, since it is larger than the sum of its proper divisors (1).

428267219 is an equidigital number, since it uses as much as digits as its factorization.

428267219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 41.

The square root of 428267219 is about 20694.6181167955. The cubic root of 428267219 is about 753.7690093269.

The spelling of 428267219 in words is "four hundred twenty-eight million, two hundred sixty-seven thousand, two hundred nineteen".