204530113 has 4 divisors (see below), whose sum is σ = 206340228. Its totient is φ = 202720000.

The previous prime is 204530101. The next prime is 204530119. The reversal of 204530113 is 311035402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311035402 = 2 ⋅155517701.

It can be written as a sum of positive squares in 2 ways, for example, as 42146064 + 162384049 = 6492^2 + 12743^2 .

It is a cyclic number.

It is not a de Polignac number, because 204530113 - 2²¹ = 202432961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204530119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 904888 + ... + 905113.

It is an arithmetic number, because the mean of its divisors is an integer number (51585057).

Almost surely, 2^204530113 is an apocalyptic number.

It is an amenable number.

204530113 is a deficient number, since it is larger than the sum of its proper divisors (1810115).

204530113 is a wasteful number, since it uses less digits than its factorization.

204530113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810114.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 204530113 is about 14301.4024836727. The cubic root of 204530113 is about 589.1860009069.

Adding to 204530113 its reverse (311035402), we get a palindrome (515565515).

The spelling of 204530113 in words is "two hundred four million, five hundred thirty thousand, one hundred thirteen".