212082521 has 16 divisors (see below), whose sum is σ = 251164800. Its totient is φ = 175314048.

The previous prime is 212082509. The next prime is 212082523. The reversal of 212082521 is 125280212.

212082521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-212082521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212082523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17045 + ... + 26733.

It is an arithmetic number, because the mean of its divisors is an integer number (15697800).

Almost surely, 2^212082521 is an apocalyptic number.

It is an amenable number.

212082521 is a deficient number, since it is larger than the sum of its proper divisors (39082279).

212082521 is an equidigital number, since it uses as much as digits as its factorization.

212082521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9808.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 212082521 is about 14563.0532856266. The cubic root of 212082521 is about 596.3505521854.

The spelling of 212082521 in words is "two hundred twelve million, eighty-two thousand, five hundred twenty-one".