206550506 has 4 divisors (see below), whose sum is σ = 309825762. Its totient is φ = 103275252.

The previous prime is 206550479. The next prime is 206550559. The reversal of 206550506 is 605055602.

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

It can be written as a sum of positive squares in only one way, i.e., 112169281 + 94381225 = 10591^2 + 9715^2 .

It is a super-2 number, since 2×206550506² = 85326223057712072, which contains 22 as substring.

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, 51637625 + ... + 51637628.

Almost surely, 2^206550506 is an apocalyptic number.

206550506 is a deficient number, since it is larger than the sum of its proper divisors (103275256).

206550506 is a wasteful number, since it uses less digits than its factorization.

206550506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103275255.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 206550506 is about 14371.8650842540. The cubic root of 206550506 is about 591.1196835800.

The spelling of 206550506 in words is "two hundred six million, five hundred fifty thousand, five hundred six".