206206651 has 12 divisors (see below), whose sum is σ = 253984248. Its totient is φ = 166350912.

The previous prime is 206206621. The next prime is 206206667. The reversal of 206206651 is 156602602.

It is not a de Polignac number, because 206206651 - 2²³ = 197818043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206206621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122941 + ... + 124606.

It is an arithmetic number, because the mean of its divisors is an integer number (21165354).

Almost surely, 2^206206651 is an apocalyptic number.

206206651 is a deficient number, since it is larger than the sum of its proper divisors (47777597).

206206651 is a wasteful number, since it uses less digits than its factorization.

206206651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247578 (or 247571 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 206206651 is about 14359.8973185744. The cubic root of 206206651 is about 590.7914791790.

The spelling of 206206651 in words is "two hundred six million, two hundred six thousand, six hundred fifty-one".