131443406 has 8 divisors (see below), whose sum is σ = 207542280. Its totient is φ = 62262648.

The previous prime is 131443397. The next prime is 131443409. The reversal of 131443406 is 604344131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131443409) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1729481 + ... + 1729556.

It is an arithmetic number, because the mean of its divisors is an integer number (25942785).

Almost surely, 2^131443406 is an apocalyptic number.

131443406 is a deficient number, since it is larger than the sum of its proper divisors (76098874).

131443406 is a wasteful number, since it uses less digits than its factorization.

131443406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3459058.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 131443406 is about 11464.8770599601. The cubic root of 131443406 is about 508.4476776786.

Adding to 131443406 its reverse (604344131), we get a palindrome (735787537).

The spelling of 131443406 in words is "one hundred thirty-one million, four hundred forty-three thousand, four hundred six".