128020219 has 4 divisors (see below), whose sum is σ = 128569896. Its totient is φ = 127470544.

The previous prime is 128020201. The next prime is 128020223. The reversal of 128020219 is 912020821.

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 128020219 - 2⁷ = 128020091 is a prime.

It is a super-2 number, since 2×128020219² = 32778352945615922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128020193 and 128020202.

It is not an unprimeable number, because it can be changed into a prime (128020229) 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, 274489 + ... + 274954.

It is an arithmetic number, because the mean of its divisors is an integer number (32142474).

Almost surely, 2^128020219 is an apocalyptic number.

128020219 is a deficient number, since it is larger than the sum of its proper divisors (549677).

128020219 is an equidigital number, since it uses as much as digits as its factorization.

128020219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549676.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 128020219 is about 11314.6020257011. The cubic root of 128020219 is about 503.9949543356.

The spelling of 128020219 in words is "one hundred twenty-eight million, twenty thousand, two hundred nineteen".