206543122 has 4 divisors (see below), whose sum is σ = 309814686. Its totient is φ = 103271560.

The previous prime is 206543107. The next prime is 206543159. The reversal of 206543122 is 221345602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221345602 = 2 ⋅110672801.

It can be written as a sum of positive squares in only one way, i.e., 180929401 + 25613721 = 13451^2 + 5061^2 .

It is a super-2 number, since 2×206543122² = 85320122491013768, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51635779 + ... + 51635782.

Almost surely, 2^206543122 is an apocalyptic number.

206543122 is a deficient number, since it is larger than the sum of its proper divisors (103271564).

206543122 is a wasteful number, since it uses less digits than its factorization.

206543122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103271563.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 206543122 is about 14371.6081911524. The cubic root of 206543122 is about 591.1126394921.

Adding to 206543122 its reverse (221345602), we get a palindrome (427888724).

The spelling of 206543122 in words is "two hundred six million, five hundred forty-three thousand, one hundred twenty-two".