212128553 has 16 divisors (see below), whose sum is σ = 261588096. Its totient is φ = 167512320.

The previous prime is 212128519. The next prime is 212128573. The reversal of 212128553 is 355821212.

It is a cyclic number.

It is not a de Polignac number, because 212128553 - 2⁶ = 212128489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212128573) 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 15 ways as a sum of consecutive naturals, for example, 51998 + ... + 55928.

It is an arithmetic number, because the mean of its divisors is an integer number (16349256).

Almost surely, 2^212128553 is an apocalyptic number.

It is an amenable number.

212128553 is a deficient number, since it is larger than the sum of its proper divisors (49459543).

212128553 is a wasteful number, since it uses less digits than its factorization.

212128553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4544.

The product of its digits is 4800, while the sum is 29.

The square root of 212128553 is about 14564.6336376855. The cubic root of 212128553 is about 596.3936945476.

Adding to 212128553 its reverse (355821212), we get a palindrome (567949765).

The spelling of 212128553 in words is "two hundred twelve million, one hundred twenty-eight thousand, five hundred fifty-three".