212239345 has 4 divisors (see below), whose sum is σ = 254687220. Its totient is φ = 169791472.

The previous prime is 212239337. The next prime is 212239369. The reversal of 212239345 is 543932212.

212239345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 92621376 + 119617969 = 9624^2 + 10937^2 .

It is a cyclic number.

It is not a de Polignac number, because 212239345 - 2³ = 212239337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21223930 + ... + 21223939.

It is an arithmetic number, because the mean of its divisors is an integer number (63671805).

Almost surely, 2^212239345 is an apocalyptic number.

It is an amenable number.

212239345 is a deficient number, since it is larger than the sum of its proper divisors (42447875).

212239345 is an equidigital number, since it uses as much as digits as its factorization.

212239345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42447874.

The product of its digits is 12960, while the sum is 31.

The square root of 212239345 is about 14568.4366010907. The cubic root of 212239345 is about 596.4975060479.

The spelling of 212239345 in words is "two hundred twelve million, two hundred thirty-nine thousand, three hundred forty-five".