131306550 has 24 divisors (see below), whose sum is σ = 325640616. Its totient is φ = 35015040.

The previous prime is 131306543. The next prime is 131306551. The reversal of 131306550 is 55603131.

It is a self number, because there is not a number n which added to its sum of digits gives 131306550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131306551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 437539 + ... + 437838.

It is an arithmetic number, because the mean of its divisors is an integer number (13568359).

Almost surely, 2^131306550 is an apocalyptic number.

131306550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131306550 is an abundant number, since it is smaller than the sum of its proper divisors (194334066).

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

131306550 is a wasteful number, since it uses less digits than its factorization.

131306550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875392 (or 875387 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 131306550 is about 11458.9070159418. The cubic root of 131306550 is about 508.2711548660.

Adding to 131306550 its reverse (55603131), we get a palindrome (186909681).

The spelling of 131306550 in words is "one hundred thirty-one million, three hundred six thousand, five hundred fifty".