209085545 has 8 divisors (see below), whose sum is σ = 258996480. Its totient is φ = 161872560.

The previous prime is 209085529. The next prime is 209085559. The reversal of 209085545 is 545580902.

209085545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 209085545 - 2⁴ = 209085529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 209085499 and 209085508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 674315 + ... + 674624.

It is an arithmetic number, because the mean of its divisors is an integer number (32374560).

Almost surely, 2^209085545 is an apocalyptic number.

It is an amenable number.

209085545 is a deficient number, since it is larger than the sum of its proper divisors (49910935).

209085545 is a wasteful number, since it uses less digits than its factorization.

209085545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348975.

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 209085545 is about 14459.7906278065. The cubic root of 209085545 is about 593.5281702077.

The spelling of 209085545 in words is "two hundred nine million, eighty-five thousand, five hundred forty-five".