206131551300 has 72 divisors (see below), whose sum is σ = 662674773600. Its totient is φ = 54968412960.

The previous prime is 206131551233. The next prime is 206131551319. The reversal of 206131551300 is 3155131602.

206131551300 is a `hidden beast` number, since 2 + 0 + 613 + 15 + 5 + 1 + 30 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38169810 + ... + 38175209.

It is an arithmetic number, because the mean of its divisors is an integer number (9203816300).

Almost surely, 2^206131551300 is an apocalyptic number.

206131551300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206131551300 is an abundant number, since it is smaller than the sum of its proper divisors (456543222300).

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

206131551300 is a wasteful number, since it uses less digits than its factorization.

206131551300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76345042 (or 76345029 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

Adding to 206131551300 its reverse (3155131602), we get a palindrome (209286682902).

The spelling of 206131551300 in words is "two hundred six billion, one hundred thirty-one million, five hundred fifty-one thousand, three hundred".