205430545446531 has 16 divisors (see below), whose sum is σ = 274316765329056. Its totient is φ = 136749014793216.

The previous prime is 205430545446349. The next prime is 205430545446629. The reversal of 205430545446531 is 135644545034502.

It is not a de Polignac number, because 205430545446531 - 2¹¹ = 205430545444483 is a prime.

It is a super-2 number, since 2×205430545446531² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205430545406531) 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, 275368381 + ... + 276113393.

It is an arithmetic number, because the mean of its divisors is an integer number (17144797833066).

Almost surely, 2^{205430545446531} is an apocalyptic number.

205430545446531 is a deficient number, since it is larger than the sum of its proper divisors (68886219882525).

205430545446531 is a wasteful number, since it uses less digits than its factorization.

205430545446531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882262.

The product of its (nonzero) digits is 17280000, while the sum is 51.

The spelling of 205430545446531 in words is "two hundred five trillion, four hundred thirty billion, five hundred forty-five million, four hundred forty-six thousand, five hundred thirty-one".