204311061 has 24 divisors (see below), whose sum is σ = 306029880. Its totient is φ = 131193216.

The previous prime is 204311053. The next prime is 204311087. The reversal of 204311061 is 160113402.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2954961 + 201356100 = 1719^2 + 14190^2 .

It is not a de Polignac number, because 204311061 - 2³ = 204311053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204311561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159355 + ... + 160631.

It is an arithmetic number, because the mean of its divisors is an integer number (12751245).

Almost surely, 2^204311061 is an apocalyptic number.

It is an amenable number.

204311061 is a deficient number, since it is larger than the sum of its proper divisors (101718819).

204311061 is a wasteful number, since it uses less digits than its factorization.

204311061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925 (or 1922 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 204311061 is about 14293.7420222977. The cubic root of 204311061 is about 588.9755861294.

Adding to 204311061 its reverse (160113402), we get a palindrome (364424463).

The spelling of 204311061 in words is "two hundred four million, three hundred eleven thousand, sixty-one".