206122051 has 4 divisors (see below), whose sum is σ = 216970600. Its totient is φ = 195273504.

The previous prime is 206122031. The next prime is 206122151. The reversal of 206122051 is 150221602.

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

It is a cyclic number.

It is not a de Polignac number, because 206122051 - 2⁵ = 206122019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 10848529 = 206122051 / (2 + 0 + 6 + 1 + 2 + 2 + 0 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206122001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5424246 + ... + 5424283.

It is an arithmetic number, because the mean of its divisors is an integer number (54242650).

Almost surely, 2^206122051 is an apocalyptic number.

206122051 is a deficient number, since it is larger than the sum of its proper divisors (10848549).

206122051 is a wasteful number, since it uses less digits than its factorization.

206122051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10848548.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 206122051 is about 14356.9513128658. The cubic root of 206122051 is about 590.7106738386.

Adding to 206122051 its reverse (150221602), we get a palindrome (356343653).

The spelling of 206122051 in words is "two hundred six million, one hundred twenty-two thousand, fifty-one".