131171400 has 144 divisors (see below), whose sum is σ = 457002000. Its totient is φ = 34966080.

The previous prime is 131171399. The next prime is 131171431. The reversal of 131171400 is 4171131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 47251 + ... + 49949.

It is an arithmetic number, because the mean of its divisors is an integer number (3173625).

Almost surely, 2^131171400 is an apocalyptic number.

131171400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131171400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228501000).

131171400 is an abundant number, since it is smaller than the sum of its proper divisors (325830600).

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

131171400 is a wasteful number, since it uses less digits than its factorization.

131171400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730 (or 2709 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 131171400 is about 11453.0083384236. The cubic root of 131171400 is about 508.0967121138.

The spelling of 131171400 in words is "one hundred thirty-one million, one hundred seventy-one thousand, four hundred".