2128551 has 16 divisors (see below), whose sum is σ = 3024000. Its totient is φ = 1327968.

The previous prime is 2128549. The next prime is 2128559. The reversal of 2128551 is 1558212.

2128551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2128551 - 2¹ = 2128549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5925 + ... + 6273.

It is an arithmetic number, because the mean of its divisors is an integer number (189000).

2^2128551 is an apocalyptic number.

2128551 is a deficient number, since it is larger than the sum of its proper divisors (895449).

2128551 is a wasteful number, since it uses less digits than its factorization.

2128551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478.

The product of its digits is 800, while the sum is 24.

The square root of 2128551 is about 1458.9554482574. The cubic root of 2128551 is about 128.6356523934.

The spelling of 2128551 in words is "two million, one hundred twenty-eight thousand, five hundred fifty-one".