131443400 has 48 divisors (see below), whose sum is σ = 333393840. Its totient is φ = 47796800.

The previous prime is 131443397. The next prime is 131443409. The reversal of 131443400 is 4344131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (131443409) 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, 27674 + ... + 32073.

It is an arithmetic number, because the mean of its divisors is an integer number (6945705).

Almost surely, 2^131443400 is an apocalyptic number.

131443400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131443400 is an abundant number, since it is smaller than the sum of its proper divisors (201950440).

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

131443400 is a wasteful number, since it uses less digits than its factorization.

131443400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59774 (or 59765 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 131443400 is about 11464.8767982914. The cubic root of 131443400 is about 508.4476699422.

Adding to 131443400 its reverse (4344131), we get a palindrome (135787531).

The spelling of 131443400 in words is "one hundred thirty-one million, four hundred forty-three thousand, four hundred".