212681701 has 4 divisors (see below), whose sum is σ = 213594732. Its totient is φ = 211768672.

The previous prime is 212681699. The next prime is 212681717. The reversal of 212681701 is 107186212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29052100 + 183629601 = 5390^2 + 13551^2 .

It is a cyclic number.

It is not a de Polignac number, because 212681701 - 2¹ = 212681699 is a prime.

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 212681701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212681771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456166 + ... + 456631.

It is an arithmetic number, because the mean of its divisors is an integer number (53398683).

Almost surely, 2^212681701 is an apocalyptic number.

It is an amenable number.

212681701 is a deficient number, since it is larger than the sum of its proper divisors (913031).

212681701 is an equidigital number, since it uses as much as digits as its factorization.

212681701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913030.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 212681701 is about 14583.6106983147. The cubic root of 212681701 is about 596.9116315009.

The spelling of 212681701 in words is "two hundred twelve million, six hundred eighty-one thousand, seven hundred one".