212348705 has 4 divisors (see below), whose sum is σ = 254818452. Its totient is φ = 169878960.

The previous prime is 212348671. The next prime is 212348707. The reversal of 212348705 is 507843212.

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 120802081 + 91546624 = 10991^2 + 9568^2 .

It is not a de Polignac number, because 212348705 - 2⁶ = 212348641 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 (212348707) 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, 21234866 + ... + 21234875.

It is an arithmetic number, because the mean of its divisors is an integer number (63704613).

Almost surely, 2^212348705 is an apocalyptic number.

It is an amenable number.

212348705 is a deficient number, since it is larger than the sum of its proper divisors (42469747).

212348705 is an equidigital number, since it uses as much as digits as its factorization.

212348705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42469746.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 212348705 is about 14572.1894374181. The cubic root of 212348705 is about 596.5999403481.

The spelling of 212348705 in words is "two hundred twelve million, three hundred forty-eight thousand, seven hundred five".