206271783487225 has 9 divisors (see below), whose sum is σ = 255777100569613. Its totient is φ = 165017369341120.

The previous prime is 206271783487139. The next prime is 206271783487229. The reversal of 206271783487225 is 522784387172602.

The square root of 206271783487225 is 14362165.

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

It can be written as a sum of positive squares in 4 ways, for example, as 31745595668329 + 174526187818896 = 5634323^2 + 13210836^2 .

It is not a de Polignac number, because 206271783487225 - 2¹³ = 206271783479033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206271783487229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 70374609 + ... + 73247041.

Almost surely, 2^{206271783487225} is an apocalyptic number.

206271783487225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

206271783487225 is the 14362165-th square number.

206271783487225 is the 7181083-rd centered octagonal number.

It is an amenable number.

206271783487225 is a deficient number, since it is larger than the sum of its proper divisors (49505317082388).

206271783487225 is an frugal number, since it uses more digits than its factorization.

206271783487225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5744876 (or 2872438 counting only the distinct ones).

The product of its (nonzero) digits is 126443520, while the sum is 64.

The spelling of 206271783487225 in words is "two hundred six trillion, two hundred seventy-one billion, seven hundred eighty-three million, four hundred eighty-seven thousand, two hundred twenty-five".