206220461 has 4 divisors (see below), whose sum is σ = 215186592. Its totient is φ = 197254332.

The previous prime is 206220397. The next prime is 206220503. The reversal of 206220461 is 164022602.

206220461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 206220461 - 2⁶ = 206220397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 8966107 = 206220461 / (2 + 0 + 6 + 2 + 2 + 0 + 4 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206220361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4483031 + ... + 4483076.

It is an arithmetic number, because the mean of its divisors is an integer number (53796648).

Almost surely, 2^206220461 is an apocalyptic number.

It is an amenable number.

206220461 is a deficient number, since it is larger than the sum of its proper divisors (8966131).

206220461 is an equidigital number, since it uses as much as digits as its factorization.

206220461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8966130.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 206220461 is about 14360.3781635443. The cubic root of 206220461 is about 590.8046676450.

The spelling of 206220461 in words is "two hundred six million, two hundred twenty thousand, four hundred sixty-one".