204005156 has 6 divisors (see below), whose sum is σ = 357009030. Its totient is φ = 102002576.

The previous prime is 204005129. The next prime is 204005159. The reversal of 204005156 is 651500402.

It can be written as a sum of positive squares in only one way, i.e., 120648256 + 83356900 = 10984^2 + 9130^2 .

It is not an unprimeable number, because it can be changed into a prime (204005159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25500641 + ... + 25500648.

It is an arithmetic number, because the mean of its divisors is an integer number (59501505).

Almost surely, 2^204005156 is an apocalyptic number.

It is an amenable number.

204005156 is a deficient number, since it is larger than the sum of its proper divisors (153003874).

204005156 is a wasteful number, since it uses less digits than its factorization.

204005156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51001293 (or 51001291 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 204005156 is about 14283.0373520481. The cubic root of 204005156 is about 588.6814911501.

Adding to 204005156 its reverse (651500402), we get a palindrome (855505558).

The spelling of 204005156 in words is "two hundred four million, five thousand, one hundred fifty-six".