131806550 has 24 divisors (see below), whose sum is σ = 245708976. Its totient is φ = 52604640.

The previous prime is 131806511. The next prime is 131806561. The reversal of 131806550 is 55608131.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21644 + ... + 27056.

It is an arithmetic number, because the mean of its divisors is an integer number (10237874).

Almost surely, 2^131806550 is an apocalyptic number.

131806550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131806550 is a deficient number, since it is larger than the sum of its proper divisors (113902426).

131806550 is a wasteful number, since it uses less digits than its factorization.

131806550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5912 (or 5907 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 131806550 is about 11480.7033756648. The cubic root of 131806550 is about 508.9154834372.

The spelling of 131806550 in words is "one hundred thirty-one million, eight hundred six thousand, five hundred fifty".