205164425 has 6 divisors (see below), whose sum is σ = 254403918. Its totient is φ = 164131520.

The previous prime is 205164403. The next prime is 205164433. The reversal of 205164425 is 524461502.

205164425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 20286016 + 184878409 = 4504^2 + 13597^2 .

It is a de Polignac number, because none of the positive numbers 2^k-205164425 is a prime.

It is a Duffinian number.

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, 4103264 + ... + 4103313.

It is an arithmetic number, because the mean of its divisors is an integer number (42400653).

Almost surely, 2^205164425 is an apocalyptic number.

205164425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205164425 is a deficient number, since it is larger than the sum of its proper divisors (49239493).

205164425 is an equidigital number, since it uses as much as digits as its factorization.

205164425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8206587 (or 8206582 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 205164425 is about 14323.5618824369. The cubic root of 205164425 is about 589.7944558355.

The spelling of 205164425 in words is "two hundred five million, one hundred sixty-four thousand, four hundred twenty-five".