131820750 has 128 divisors (see below), whose sum is σ = 372902400. Its totient is φ = 34452000.

The previous prime is 131820749. The next prime is 131820779. The reversal of 131820750 is 57028131.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 398085 + ... + 398415.

It is an arithmetic number, because the mean of its divisors is an integer number (2913300).

Almost surely, 2^131820750 is an apocalyptic number.

131820750 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 131820750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186451200).

131820750 is an abundant number, since it is smaller than the sum of its proper divisors (241081650).

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

131820750 is a wasteful number, since it uses less digits than its factorization.

131820750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 131820750 is about 11481.3217880173. The cubic root of 131820750 is about 508.9337585542.

Adding to 131820750 its reverse (57028131), we get a palindrome (188848881).

The spelling of 131820750 in words is "one hundred thirty-one million, eight hundred twenty thousand, seven hundred fifty".