206517531364 has 27 divisors (see below), whose sum is σ = 381460052547. Its totient is φ = 97815913848.

The previous prime is 206517531329. The next prime is 206517531391. The reversal of 206517531364 is 463135715602.

The square root of 206517531364 is 454442.

It is a perfect power (a square), and thus also a powerful number.

206517531364 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206517531364.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17262817 + ... + 17274775.

Almost surely, 2^206517531364 is an apocalyptic number.

206517531364 is the 454442-nd square number.

It is an amenable number.

206517531364 is a deficient number, since it is larger than the sum of its proper divisors (174942521183).

206517531364 is an frugal number, since it uses more digits than its factorization.

206517531364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23960 (or 11980 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 43.

It can be divided in two parts, 206517 and 531364, that added together give a square (737881 = 859²).

The spelling of 206517531364 in words is "two hundred six billion, five hundred seventeen million, five hundred thirty-one thousand, three hundred sixty-four".