208706707489225 has 81 divisors (see below), whose sum is σ = 302198986922133. Its totient is φ = 142848821280000.

The previous prime is 208706707489199. The next prime is 208706707489271. The reversal of 208706707489225 is 522984707607802.

The square root of 208706707489225 is 14446685.

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 4881859317049 + 203824848172176 = 2209493^2 + 14276724^2 .

It is not a de Polignac number, because 208706707489225 - 2¹¹ = 208706707487177 is a prime.

It is a super-2 number, since 2×208706707489225² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 13507642750 + ... + 13507658200.

Almost surely, 2^{208706707489225} is an apocalyptic number.

208706707489225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

208706707489225 is the 14446685-th square number.

208706707489225 is the 7223343-rd centered octagonal number.

It is an amenable number.

208706707489225 is a deficient number, since it is larger than the sum of its proper divisors (93492279432908).

208706707489225 is an frugal number, since it uses more digits than its factorization.

208706707489225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30968 (or 15484 counting only the distinct ones).

The product of its (nonzero) digits is 189665280, while the sum is 67.

The spelling of 208706707489225 in words is "two hundred eight trillion, seven hundred six billion, seven hundred seven million, four hundred eighty-nine thousand, two hundred twenty-five".