210775345 has 12 divisors (see below), whose sum is σ = 278015220. Its totient is φ = 153290720.

The previous prime is 210775321. The next prime is 210775349. The reversal of 210775345 is 543577012.

It can be written as a sum of positive squares in 2 ways, for example, as 163660849 + 47114496 = 12793^2 + 6864^2 .

It is not a de Polignac number, because 210775345 - 2⁹ = 210774833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210775345.

It is not an unprimeable number, because it can be changed into a prime (210775349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173590 + ... + 174799.

It is an arithmetic number, because the mean of its divisors is an integer number (23167935).

Almost surely, 2^210775345 is an apocalyptic number.

It is an amenable number.

210775345 is a deficient number, since it is larger than the sum of its proper divisors (67239875).

210775345 is a wasteful number, since it uses less digits than its factorization.

210775345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348416 (or 348405 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 210775345 is about 14518.1040428838. The cubic root of 210775345 is about 595.1228190780.

The spelling of 210775345 in words is "two hundred ten million, seven hundred seventy-five thousand, three hundred forty-five".