206555122 has 4 divisors (see below), whose sum is σ = 309832686. Its totient is φ = 103277560.

The previous prime is 206555113. The next prime is 206555131. The reversal of 206555122 is 221555602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221555602 = 2 ⋅110777801.

It is an interprime number because it is at equal distance from previous prime (206555113) and next prime (206555131).

It can be written as a sum of positive squares in only one way, i.e., 110691441 + 95863681 = 10521^2 + 9791^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51638779 + ... + 51638782.

Almost surely, 2^206555122 is an apocalyptic number.

206555122 is a deficient number, since it is larger than the sum of its proper divisors (103277564).

206555122 is a wasteful number, since it uses less digits than its factorization.

206555122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103277563.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 206555122 is about 14372.0256749005. The cubic root of 206555122 is about 591.1240870037.

The spelling of 206555122 in words is "two hundred six million, five hundred fifty-five thousand, one hundred twenty-two".