206707531801 has 9 divisors (see below), whose sum is σ = 218168589951. Its totient is φ = 195820004304.

The previous prime is 206707531769. The next prime is 206707531817. The reversal of 206707531801 is 108135707602.

The square root of 206707531801 is 454651.

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

It can be written as a sum of positive squares in only one way, i.e., 142658045401 + 64049486400 = 377701^2 + 253080^2 .

It is not a de Polignac number, because 206707531801 - 2⁵ = 206707531769 is a prime.

It is a super-2 number, since 2×206707531801² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206707538801) 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 in 8 ways as a sum of consecutive naturals, for example, 8626405 + ... + 8650333.

It is an arithmetic number, because the mean of its divisors is an integer number (24240954439).

Almost surely, 2^206707531801 is an apocalyptic number.

206707531801 is the 454651-st square number.

206707531801 is the 227326-th centered octagonal number.

It is an amenable number.

206707531801 is a deficient number, since it is larger than the sum of its proper divisors (11461058150).

206707531801 is an frugal number, since it uses more digits than its factorization.

206707531801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47896 (or 23948 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 206707531801 in words is "two hundred six billion, seven hundred seven million, five hundred thirty-one thousand, eight hundred one".