212756271 has 16 divisors (see below), whose sum is σ = 349138944. Its totient is φ = 112222944.

The previous prime is 212756213. The next prime is 212756293. The reversal of 212756271 is 172657212.

It is not a de Polignac number, because 212756271 - 2⁷ = 212756143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212757271) 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, 389391 + ... + 389936.

It is an arithmetic number, because the mean of its divisors is an integer number (21821184).

Almost surely, 2^212756271 is an apocalyptic number.

212756271 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212756271 is a deficient number, since it is larger than the sum of its proper divisors (136382673).

212756271 is a wasteful number, since it uses less digits than its factorization.

212756271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779350.

The product of its digits is 11760, while the sum is 33.

The square root of 212756271 is about 14586.1671113422. The cubic root of 212756271 is about 596.9813859727.

The spelling of 212756271 in words is "two hundred twelve million, seven hundred fifty-six thousand, two hundred seventy-one".