131822550 has 72 divisors (see below), whose sum is σ = 356200416. Its totient is φ = 34950720.

The previous prime is 131822531. The next prime is 131822599. The reversal of 131822550 is 55228131.

It is a happy number.

131822550 is a `hidden beast` number, since 1 + 31 + 82 + 2 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 87907 + ... + 89393.

It is an arithmetic number, because the mean of its divisors is an integer number (4947228).

Almost surely, 2^131822550 is an apocalyptic number.

131822550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 131822550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178100208).

131822550 is an abundant number, since it is smaller than the sum of its proper divisors (224377866).

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

131822550 is a wasteful number, since it uses less digits than its factorization.

131822550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702 (or 1694 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 131822550 is about 11481.4001759367. The cubic root of 131822550 is about 508.9360750246.

The spelling of 131822550 in words is "one hundred thirty-one million, eight hundred twenty-two thousand, five hundred fifty".