206223051 has 4 divisors (see below), whose sum is σ = 274964072. Its totient is φ = 137482032.

The previous prime is 206223047. The next prime is 206223077. The reversal of 206223051 is 150322602.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 206223051 - 2² = 206223047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206223151) 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, 34370506 + ... + 34370511.

It is an arithmetic number, because the mean of its divisors is an integer number (68741018).

Almost surely, 2^206223051 is an apocalyptic number.

206223051 is a deficient number, since it is larger than the sum of its proper divisors (68741021).

206223051 is an equidigital number, since it uses as much as digits as its factorization.

206223051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68741020.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 206223051 is about 14360.4683419448. The cubic root of 206223051 is about 590.8071410137.

Adding to 206223051 its reverse (150322602), we get a palindrome (356545653).

The spelling of 206223051 in words is "two hundred six million, two hundred twenty-three thousand, fifty-one".