206431326 has 48 divisors (see below), whose sum is σ = 455704704. Its totient is φ = 67525632.

The previous prime is 206431321. The next prime is 206431327. The reversal of 206431326 is 623134602.

206431326 is a `hidden beast` number, since 2 + 0 + 643 + 13 + 2 + 6 = 666.

It is a super-2 number, since 2×206431326² = 85227784708236552, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 206431326.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206431321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238771 + ... + 239633.

It is an arithmetic number, because the mean of its divisors is an integer number (9493848).

Almost surely, 2^206431326 is an apocalyptic number.

206431326 is an abundant number, since it is smaller than the sum of its proper divisors (249273378).

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

206431326 is a wasteful number, since it uses less digits than its factorization.

206431326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 206431326 is about 14367.7181904435. The cubic root of 206431326 is about 591.0059693454.

Adding to 206431326 its reverse (623134602), we get a palindrome (829565928).

It can be divided in two parts, 20 and 6431326, that added together give a palindrome (6431346).

The spelling of 206431326 in words is "two hundred six million, four hundred thirty-one thousand, three hundred twenty-six".