128115219 has 32 divisors (see below), whose sum is σ = 181407744. Its totient is φ = 80317440.

The previous prime is 128115217. The next prime is 128115223. The reversal of 128115219 is 912511821.

It is not a de Polignac number, because 128115219 - 2¹ = 128115217 is a prime.

It is a super-2 number, since 2×128115219² = 32827018678835922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128115217) 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 31 ways as a sum of consecutive naturals, for example, 767074 + ... + 767240.

It is an arithmetic number, because the mean of its divisors is an integer number (5668992).

Almost surely, 2^128115219 is an apocalyptic number.

128115219 is a deficient number, since it is larger than the sum of its proper divisors (53292525).

128115219 is a wasteful number, since it uses less digits than its factorization.

128115219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387.

The product of its digits is 1440, while the sum is 30.

The square root of 128115219 is about 11318.7993621232. The cubic root of 128115219 is about 504.1195900704.

The spelling of 128115219 in words is "one hundred twenty-eight million, one hundred fifteen thousand, two hundred nineteen".