204533561271 has 24 divisors (see below), whose sum is σ = 295601604096. Its totient is φ = 125739488160.

The previous prime is 204533561249. The next prime is 204533561291. The reversal of 204533561271 is 172165335402.

It is not a de Polignac number, because 204533561271 - 2⁷ = 204533561143 is a prime.

It is a super-2 number, since 2×204533561271² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204533561231) 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, 298896 + ... + 705978.

It is an arithmetic number, because the mean of its divisors is an integer number (12316733504).

Almost surely, 2^204533561271 is an apocalyptic number.

204533561271 is a deficient number, since it is larger than the sum of its proper divisors (91068042825).

204533561271 is a wasteful number, since it uses less digits than its factorization.

204533561271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408103 (or 408090 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

Adding to 204533561271 its reverse (172165335402), we get a palindrome (376698896673).

The spelling of 204533561271 in words is "two hundred four billion, five hundred thirty-three million, five hundred sixty-one thousand, two hundred seventy-one".