229209745 has 4 divisors (see below), whose sum is σ = 275051700. Its totient is φ = 183367792.

The previous prime is 229209713. The next prime is 229209779. The reversal of 229209745 is 547902922.

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 171191056 + 58018689 = 13084^2 + 7617^2 .

It is a cyclic number.

It is not a de Polignac number, because 229209745 - 2⁵ = 229209713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 229209698 and 229209707.

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, 22920970 + ... + 22920979.

It is an arithmetic number, because the mean of its divisors is an integer number (68762925).

Almost surely, 2^229209745 is an apocalyptic number.

It is an amenable number.

229209745 is a deficient number, since it is larger than the sum of its proper divisors (45841955).

229209745 is an equidigital number, since it uses as much as digits as its factorization.

229209745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45841954.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 229209745 is about 15139.6745341503. The cubic root of 229209745 is about 611.9900472914.

The spelling of 229209745 in words is "two hundred twenty-nine million, two hundred nine thousand, seven hundred forty-five".