206215625 has 48 divisors (see below), whose sum is σ = 321729408. Its totient is φ = 128400000.

The previous prime is 206215619. The next prime is 206215637. The reversal of 206215625 is 526512602.

It is not a de Polignac number, because 206215625 - 2⁸ = 206215369 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 240197 + ... + 241053.

It is an arithmetic number, because the mean of its divisors is an integer number (6702696).

Almost surely, 2^206215625 is an apocalyptic number.

206215625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

206215625 is a deficient number, since it is larger than the sum of its proper divisors (115513783).

206215625 is an frugal number, since it uses more digits than its factorization.

206215625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 206215625 is about 14360.2097825902. The cubic root of 206215625 is about 590.8000493614.

The spelling of 206215625 in words is "two hundred six million, two hundred fifteen thousand, six hundred twenty-five".