128227205 has 8 divisors (see below), whose sum is σ = 154996632. Its totient is φ = 101832448.

The previous prime is 128227199. The next prime is 128227217. The reversal of 128227205 is 502722821.

It can be written as a sum of positive squares in 4 ways, for example, as 15038884 + 113188321 = 3878^2 + 10639^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128227205 - 2¹⁰ = 128226181 is a prime.

It is a super-2 number, since 2×128227205² = 32884432204224050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92912 + ... + 94281.

It is an arithmetic number, because the mean of its divisors is an integer number (19374579).

Almost surely, 2^128227205 is an apocalyptic number.

It is an amenable number.

128227205 is a deficient number, since it is larger than the sum of its proper divisors (26769427).

128227205 is a wasteful number, since it uses less digits than its factorization.

128227205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187335.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 128227205 is about 11323.7451843460. The cubic root of 128227205 is about 504.2664315772.

The spelling of 128227205 in words is "one hundred twenty-eight million, two hundred twenty-seven thousand, two hundred five".