206225405 has 8 divisors (see below), whose sum is σ = 247564512. Its totient is φ = 164917648.

The previous prime is 206225399. The next prime is 206225407. The reversal of 206225405 is 504522602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206225405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206225407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10574 + ... + 22896.

It is an arithmetic number, because the mean of its divisors is an integer number (30945564).

Almost surely, 2^206225405 is an apocalyptic number.

It is an amenable number.

206225405 is a deficient number, since it is larger than the sum of its proper divisors (41339107).

206225405 is a wasteful number, since it uses less digits than its factorization.

206225405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15675.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 206225405 is about 14360.5503028261. The cubic root of 206225405 is about 590.8093889918.

The spelling of 206225405 in words is "two hundred six million, two hundred twenty-five thousand, four hundred five".