212528811 has 16 divisors (see below), whose sum is σ = 310082688. Its totient is φ = 128409600.

The previous prime is 212528801. The next prime is 212528821. The reversal of 212528811 is 118825212.

It is an interprime number because it is at equal distance from previous prime (212528801) and next prime (212528821).

It is not a de Polignac number, because 212528811 - 2⁹ = 212528299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212528801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1195 + ... + 20651.

It is an arithmetic number, because the mean of its divisors is an integer number (19380168).

Almost surely, 2^212528811 is an apocalyptic number.

212528811 is a deficient number, since it is larger than the sum of its proper divisors (97553877).

212528811 is a wasteful number, since it uses less digits than its factorization.

212528811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19802.

The product of its digits is 2560, while the sum is 30.

The square root of 212528811 is about 14578.3679127672. The cubic root of 212528811 is about 596.7685637208.

The spelling of 212528811 in words is "two hundred twelve million, five hundred twenty-eight thousand, eight hundred eleven".