206220477 has 8 divisors (see below), whose sum is σ = 275240416. Its totient is φ = 137340432.

The previous prime is 206220397. The next prime is 206220503. The reversal of 206220477 is 774022602.

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

It is not a de Polignac number, because 206220477 - 2⁸ = 206220221 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 (206220577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31483 + ... + 37464.

It is an arithmetic number, because the mean of its divisors is an integer number (34405052).

Almost surely, 2^206220477 is an apocalyptic number.

It is an amenable number.

206220477 is a deficient number, since it is larger than the sum of its proper divisors (69019939).

206220477 is an equidigital number, since it uses as much as digits as its factorization.

206220477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69947.

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 206220477 is about 14360.3787206327. The cubic root of 206220477 is about 590.8046829245.

The spelling of 206220477 in words is "two hundred six million, two hundred twenty thousand, four hundred seventy-seven".