206210540 has 24 divisors (see below), whose sum is σ = 438527040. Its totient is φ = 81439488.

The previous prime is 206210539. The next prime is 206210549. The reversal of 206210540 is 45012602.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (206210549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63677 + ... + 66836.

It is an arithmetic number, because the mean of its divisors is an integer number (18271960).

Almost surely, 2^206210540 is an apocalyptic number.

206210540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206210540 is an abundant number, since it is smaller than the sum of its proper divisors (232316500).

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

206210540 is a wasteful number, since it uses less digits than its factorization.

206210540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130601 (or 130599 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 206210540 is about 14360.0327297677. The cubic root of 206210540 is about 590.7951932099.

The spelling of 206210540 in words is "two hundred six million, two hundred ten thousand, five hundred forty".