205401034225 has 6 divisors (see below), whose sum is σ = 254697282470. Its totient is φ = 164320827360.

The previous prime is 205401034213. The next prime is 205401034229. The reversal of 205401034225 is 522430104502.

It can be written as a sum of positive squares in 3 ways, for example, as 34244242704 + 171156791521 = 185052^2 + 413711^2 .

It is not a de Polignac number, because 205401034225 - 2¹⁵ = 205401001457 is a prime.

It is a super-3 number, since 3×205401034225³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205401034193 and 205401034202.

It is not an unprimeable number, because it can be changed into a prime (205401034229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4108020660 + ... + 4108020709.

Almost surely, 2^205401034225 is an apocalyptic number.

205401034225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205401034225 is a deficient number, since it is larger than the sum of its proper divisors (49296248245).

205401034225 is an equidigital number, since it uses as much as digits as its factorization.

205401034225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8216041379 (or 8216041374 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 205401034225 its reverse (522430104502), we get a palindrome (727831138727).

The spelling of 205401034225 in words is "two hundred five billion, four hundred one million, thirty-four thousand, two hundred twenty-five".