209228245 has 8 divisors (see below), whose sum is σ = 251155800. Its totient is φ = 167328000.

The previous prime is 209228237. The next prime is 209228249. The reversal of 209228245 is 542822902.

209228245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 42276004 + 166952241 = 6502^2 + 12921^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 209228245 - 2³ = 209228237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 209228245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209228249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18745 + ... + 27745.

It is an arithmetic number, because the mean of its divisors is an integer number (31394475).

Almost surely, 2^209228245 is an apocalyptic number.

It is an amenable number.

209228245 is a deficient number, since it is larger than the sum of its proper divisors (41927555).

209228245 is an equidigital number, since it uses as much as digits as its factorization.

209228245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13655.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 209228245 is about 14464.7241591397. The cubic root of 209228245 is about 593.6631663228.

The spelling of 209228245 in words is "two hundred nine million, two hundred twenty-eight thousand, two hundred forty-five".