209500241 has 4 divisors (see below), whose sum is σ = 210563892. Its totient is φ = 208436592.

The previous prime is 209500237. The next prime is 209500243. The reversal of 209500241 is 142005902.

209500241 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, and also an emirpimes, since its reverse is a distinct semiprime: 142005902 = 2 ⋅71002951.

It can be written as a sum of positive squares in 2 ways, for example, as 145564225 + 63936016 = 12065^2 + 7996^2 .

It is a cyclic number.

It is not a de Polignac number, because 209500241 - 2² = 209500237 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209500243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531530 + ... + 531923.

It is an arithmetic number, because the mean of its divisors is an integer number (52640973).

Almost surely, 2^209500241 is an apocalyptic number.

It is an amenable number.

209500241 is a deficient number, since it is larger than the sum of its proper divisors (1063651).

209500241 is a wasteful number, since it uses less digits than its factorization.

209500241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063650.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 209500241 is about 14474.1231513346. The cubic root of 209500241 is about 593.9203082862.

The spelling of 209500241 in words is "two hundred nine million, five hundred thousand, two hundred forty-one".