206440230053 has 4 divisors (see below), whose sum is σ = 206559354828. Its totient is φ = 206321105280.

The previous prime is 206440230037. The next prime is 206440230103. The reversal of 206440230053 is 350032044602.

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 29567834209 + 176872395844 = 171953^2 + 420562^2 .

It is a cyclic number.

It is not a de Polignac number, because 206440230053 - 2⁴ = 206440230037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206440229998 and 206440230025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206440230553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59559788 + ... + 59563253.

It is an arithmetic number, because the mean of its divisors is an integer number (51639838707).

Almost surely, 2^206440230053 is an apocalyptic number.

It is an amenable number.

206440230053 is a deficient number, since it is larger than the sum of its proper divisors (119124775).

206440230053 is a wasteful number, since it uses less digits than its factorization.

206440230053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119124774.

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 206440230053 its reverse (350032044602), we get a palindrome (556472274655).

The spelling of 206440230053 in words is "two hundred six billion, four hundred forty million, two hundred thirty thousand, fifty-three".