128512233 has 12 divisors (see below), whose sum is σ = 185759028. Its totient is φ = 85614720.

The previous prime is 128512229. The next prime is 128512271. The reversal of 128512233 is 332215821.

128512233 is a `hidden beast` number, since 128 + 512 + 23 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 116380944 + 12131289 = 10788^2 + 3483^2 .

It is not a de Polignac number, because 128512233 - 2² = 128512229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128512197 and 128512206.

It is not an unprimeable number, because it can be changed into a prime (128512213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11341 + ... + 19637.

It is an arithmetic number, because the mean of its divisors is an integer number (15479919).

Almost surely, 2^128512233 is an apocalyptic number.

It is an amenable number.

128512233 is a deficient number, since it is larger than the sum of its proper divisors (57246795).

128512233 is a wasteful number, since it uses less digits than its factorization.

128512233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10024 (or 10021 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 128512233 is about 11336.3236104127. The cubic root of 128512233 is about 504.6397888735.

The spelling of 128512233 in words is "one hundred twenty-eight million, five hundred twelve thousand, two hundred thirty-three".