131312550 has 24 divisors (see below), whose sum is σ = 325655496. Its totient is φ = 35016640.

The previous prime is 131312527. The next prime is 131312567. The reversal of 131312550 is 55213131.

It is a Curzon number.

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, 437559 + ... + 437858.

It is an arithmetic number, because the mean of its divisors is an integer number (13568979).

Almost surely, 2^131312550 is an apocalyptic number.

131312550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131312550 is an abundant number, since it is smaller than the sum of its proper divisors (194342946).

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

131312550 is a wasteful number, since it uses less digits than its factorization.

131312550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875432 (or 875427 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 131312550 is about 11459.1688180252. The cubic root of 131312550 is about 508.2788964968.

Adding to 131312550 its reverse (55213131), we get a palindrome (186525681).

The spelling of 131312550 in words is "one hundred thirty-one million, three hundred twelve thousand, five hundred fifty".