206022261 has 16 divisors (see below), whose sum is σ = 276756480. Its totient is φ = 136323120.

The previous prime is 206022239. The next prime is 206022281. The reversal of 206022261 is 162220602.

It is not a de Polignac number, because 206022261 - 2⁹ = 206021749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206022281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 409336 + ... + 409838.

It is an arithmetic number, because the mean of its divisors is an integer number (17297280).

Almost surely, 2^206022261 is an apocalyptic number.

It is an amenable number.

206022261 is a deficient number, since it is larger than the sum of its proper divisors (70734219).

206022261 is a wasteful number, since it uses less digits than its factorization.

206022261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 206022261 is about 14353.4755721393. The cubic root of 206022261 is about 590.6153314058.

Adding to 206022261 its reverse (162220602), we get a palindrome (368242863).

The spelling of 206022261 in words is "two hundred six million, twenty-two thousand, two hundred sixty-one".