205213061231225 has 6 divisors (see below), whose sum is σ = 254464195926750. Its totient is φ = 164170448984960.

The previous prime is 205213061231197. The next prime is 205213061231231. The reversal of 205213061231225 is 522132160312502.

It can be written as a sum of positive squares in 3 ways, for example, as 24074517483241 + 181138543747984 = 4906579^2 + 13458772^2 .

It is not a de Polignac number, because 205213061231225 - 2¹² = 205213061227129 is a prime.

It is a super-2 number, since 2×205213061231225² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4104261224600 + ... + 4104261224649.

It is an arithmetic number, because the mean of its divisors is an integer number (42410699321125).

Almost surely, 2^{205213061231225} is an apocalyptic number.

205213061231225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205213061231225 is a deficient number, since it is larger than the sum of its proper divisors (49251134695525).

205213061231225 is an equidigital number, since it uses as much as digits as its factorization.

205213061231225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8208522449259 (or 8208522449254 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 205213061231225 in words is "two hundred five trillion, two hundred thirteen billion, sixty-one million, two hundred thirty-one thousand, two hundred twenty-five".