204513156 has 18 divisors (see below), whose sum is σ = 516963902. Its totient is φ = 68171040.

The previous prime is 204513149. The next prime is 204513193. The reversal of 204513156 is 651315402.

It can be written as a sum of positive squares in only one way, i.e., 119246400 + 85266756 = 10920^2 + 9234^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2840425 + ... + 2840496.

Almost surely, 2^204513156 is an apocalyptic number.

It is an amenable number.

204513156 is an abundant number, since it is smaller than the sum of its proper divisors (312450746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204513156 is a wasteful number, since it uses less digits than its factorization.

204513156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5680931 (or 5680926 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 204513156 is about 14300.8096274302. The cubic root of 204513156 is about 589.1697178879.

Adding to 204513156 its reverse (651315402), we get a palindrome (855828558).

The spelling of 204513156 in words is "two hundred four million, five hundred thirteen thousand, one hundred fifty-six".