207812898225 has 27 divisors (see below), whose sum is σ = 372228239019. Its totient is φ = 110829898800.

The previous prime is 207812898211. The next prime is 207812898247. The reversal of 207812898225 is 522898218702.

The square root of 207812898225 is 455865.

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

207812898225 is a `hidden beast` number, since 207 + 8 + 128 + 98 + 225 = 666.

It can be written as a sum of positive squares in only one way, i.e., 74812643361 + 133000254864 = 273519^2 + 364692^2 .

It is not a de Polignac number, because 207812898225 - 2¹¹ = 207812896177 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6822780 + ... + 6853170.

Almost surely, 2^207812898225 is an apocalyptic number.

207812898225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

207812898225 is the 455865-th square number.

207812898225 is the 227933-rd centered octagonal number.

It is an amenable number.

207812898225 is a deficient number, since it is larger than the sum of its proper divisors (164415340794).

207812898225 is an frugal number, since it uses more digits than its factorization.

207812898225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60798 (or 30399 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 207812898225 in words is "two hundred seven billion, eight hundred twelve million, eight hundred ninety-eight thousand, two hundred twenty-five".