212552081 has 4 divisors (see below), whose sum is σ = 242916672. Its totient is φ = 182187492.

The previous prime is 212552059. The next prime is 212552083. The reversal of 212552081 is 180255212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212552081 - 2¹⁰ = 212551057 is a prime.

It is a super-2 number, since 2×212552081² = 90356774274861122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212552081.

It is not an unprimeable number, because it can be changed into a prime (212552083) 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 3 ways as a sum of consecutive naturals, for example, 15182285 + ... + 15182298.

It is an arithmetic number, because the mean of its divisors is an integer number (60729168).

Almost surely, 2^212552081 is an apocalyptic number.

It is an amenable number.

212552081 is a deficient number, since it is larger than the sum of its proper divisors (30364591).

212552081 is an equidigital number, since it uses as much as digits as its factorization.

212552081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30364590.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 212552081 is about 14579.1659912356. The cubic root of 212552081 is about 596.7903431957.

The spelling of 212552081 in words is "two hundred twelve million, five hundred fifty-two thousand, eighty-one".