206231040 has 120 divisors (see below), whose sum is σ = 714315888. Its totient is φ = 54988800.

The previous prime is 206231033. The next prime is 206231071. The reversal of 206231040 is 40132602.

206231040 = T₁₆₈₀ + T₁₆₈₁ + ... + T₁₈₁₄.

It is a happy number.

206231040 is a `hidden beast` number, since 2 + 0 + 623 + 1 + 0 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18565 + ... + 27515.

Almost surely, 2^206231040 is an apocalyptic number.

206231040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206231040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357157944).

206231040 is an abundant number, since it is smaller than the sum of its proper divisors (508084848).

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

206231040 is an equidigital number, since it uses as much as digits as its factorization.

206231040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8980 (or 8961 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 206231040 is about 14360.7464987026. The cubic root of 206231040 is about 590.8147701273.

Adding to 206231040 its reverse (40132602), we get a palindrome (246363642).

The spelling of 206231040 in words is "two hundred six million, two hundred thirty-one thousand, forty".