204235505531 has 16 divisors (see below), whose sum is σ = 212793467040. Its totient is φ = 195783598080.

The previous prime is 204235505497. The next prime is 204235505543. The reversal of 204235505531 is 135505532402.

It is a cyclic number.

It is not a de Polignac number, because 204235505531 - 2²² = 204231311227 is a prime.

It is a super-2 number, since 2×204235505531² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204235505491 and 204235505500.

It is not an unprimeable number, because it can be changed into a prime (204237505531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2243441 + ... + 2332701.

It is an arithmetic number, because the mean of its divisors is an integer number (13299591690).

Almost surely, 2^204235505531 is an apocalyptic number.

204235505531 is a deficient number, since it is larger than the sum of its proper divisors (8557961509).

204235505531 is a wasteful number, since it uses less digits than its factorization.

204235505531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89854.

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 204235505531 in words is "two hundred four billion, two hundred thirty-five million, five hundred five thousand, five hundred thirty-one".