205340725 has 6 divisors (see below), whose sum is σ = 254622530. Its totient is φ = 164272560.

The previous prime is 205340719. The next prime is 205340731. The reversal of 205340725 is 527043502.

It is an interprime number because it is at equal distance from previous prime (205340719) and next prime (205340731).

It can be written as a sum of positive squares in 3 ways, for example, as 8191044 + 197149681 = 2862^2 + 14041^2 .

It is not a de Polignac number, because 205340725 - 2⁵ = 205340693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205340693 and 205340702.

It is a congruent 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, 4106790 + ... + 4106839.

Almost surely, 2^205340725 is an apocalyptic number.

205340725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205340725 is a deficient number, since it is larger than the sum of its proper divisors (49281805).

205340725 is an equidigital number, since it uses as much as digits as its factorization.

205340725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8213639 (or 8213634 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 205340725 is about 14329.7147564074. The cubic root of 205340725 is about 589.9633463775.

It can be divided in two parts, 2053 and 40725, that added together give a triangular number (42778 = T₂₉₂).

The spelling of 205340725 in words is "two hundred five million, three hundred forty thousand, seven hundred twenty-five".