206140471 has 4 divisors (see below), whose sum is σ = 206942832. Its totient is φ = 205338112.

The previous prime is 206140463. The next prime is 206140523. The reversal of 206140471 is 174041602.

206140471 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.

It is a cyclic number.

It is not a de Polignac number, because 206140471 - 2³ = 206140463 is a prime.

It is a super-3 number, since 3×206140471³ (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 (206140271) 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, 400795 + ... + 401308.

It is an arithmetic number, because the mean of its divisors is an integer number (51735708).

Almost surely, 2^206140471 is an apocalyptic number.

206140471 is a deficient number, since it is larger than the sum of its proper divisors (802361).

206140471 is an equidigital number, since it uses as much as digits as its factorization.

206140471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802360.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 206140471 is about 14357.5927996304. The cubic root of 206140471 is about 590.7282695082.

The spelling of 206140471 in words is "two hundred six million, one hundred forty thousand, four hundred seventy-one".