206571340 has 24 divisors (see below), whose sum is σ = 436972032. Its totient is φ = 82024320.

The previous prime is 206571329. The next prime is 206571347. The reversal of 206571340 is 43175602.

It is a junction number, because it is equal to n+sod(n) for n = 206571299 and 206571308.

It is not an unprimeable number, because it can be changed into a prime (206571347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34956 + ... + 40435.

It is an arithmetic number, because the mean of its divisors is an integer number (18207168).

Almost surely, 2^206571340 is an apocalyptic number.

206571340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206571340 is an abundant number, since it is smaller than the sum of its proper divisors (230400692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206571340 is a wasteful number, since it uses less digits than its factorization.

206571340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75537 (or 75535 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 206571340 is about 14372.5898849164. The cubic root of 206571340 is about 591.1395576110.

The spelling of 206571340 in words is "two hundred six million, five hundred seventy-one thousand, three hundred forty".