206630471 has 4 divisors (see below), whose sum is σ = 211026912. Its totient is φ = 202234032.

The previous prime is 206630443. The next prime is 206630477. The reversal of 206630471 is 174036602.

206630471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 174036602 = 2 ⋅87018301.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206630471 is a prime.

It is a super-3 number, since 3×206630471³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206630477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2198150 + ... + 2198243.

It is an arithmetic number, because the mean of its divisors is an integer number (52756728).

Almost surely, 2^206630471 is an apocalyptic number.

206630471 is a deficient number, since it is larger than the sum of its proper divisors (4396441).

206630471 is an equidigital number, since it uses as much as digits as its factorization.

206630471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4396440.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 206630471 is about 14374.6468130525. The cubic root of 206630471 is about 591.1959567521.

The spelling of 206630471 in words is "two hundred six million, six hundred thirty thousand, four hundred seventy-one".