206000025 has 48 divisors (see below), whose sum is σ = 424639488. Its totient is φ = 85608000.

The previous prime is 205999987. The next prime is 206000059. The reversal of 206000025 is 520000602.

It is not a de Polignac number, because 206000025 - 2⁸ = 205999769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 205999968 and 206000013.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12061 + ... + 23610.

It is an arithmetic number, because the mean of its divisors is an integer number (8846656).

Almost surely, 2^206000025 is an apocalyptic number.

206000025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

206000025 is an abundant number, since it is smaller than the sum of its proper divisors (218639463).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206000025 is a wasteful number, since it uses less digits than its factorization.

206000025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35702 (or 35697 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 206000025 is about 14352.7009653236. The cubic root of 206000025 is about 590.5940822538.

Adding to 206000025 its reverse (520000602), we get a palindrome (726000627).

The spelling of 206000025 in words is "two hundred six million, twenty-five", and thus it is an aban number.