209243053 has 4 divisors (see below), whose sum is σ = 209272000. Its totient is φ = 209214108.

The previous prime is 209243051. The next prime is 209243057. The reversal of 209243053 is 350342902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 209243053 - 2¹ = 209243051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209243051) 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, 6526 + ... + 21472.

It is an arithmetic number, because the mean of its divisors is an integer number (52318000).

Almost surely, 2^209243053 is an apocalyptic number.

It is an amenable number.

209243053 is a deficient number, since it is larger than the sum of its proper divisors (28947).

209243053 is a wasteful number, since it uses less digits than its factorization.

209243053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28946.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 209243053 is about 14465.2360160490. The cubic root of 209243053 is about 593.6771713739.

Adding to 209243053 its reverse (350342902), we get a palindrome (559585955).

The spelling of 209243053 in words is "two hundred nine million, two hundred forty-three thousand, fifty-three".