131405343 has 8 divisors (see below), whose sum is σ = 176942256. Its totient is φ = 86736000.

The previous prime is 131405299. The next prime is 131405353. The reversal of 131405343 is 343504131.

It is a happy number.

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

It is not a de Polignac number, because 131405343 - 2²² = 127211039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131405353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216538 + ... + 217143.

It is an arithmetic number, because the mean of its divisors is an integer number (22117782).

Almost surely, 2^131405343 is an apocalyptic number.

131405343 is a deficient number, since it is larger than the sum of its proper divisors (45536913).

131405343 is a wasteful number, since it uses less digits than its factorization.

131405343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433785.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 131405343 is about 11463.2169568581. The cubic root of 131405343 is about 508.3985946729.

Adding to 131405343 its reverse (343504131), we get a palindrome (474909474).

The spelling of 131405343 in words is "one hundred thirty-one million, four hundred five thousand, three hundred forty-three".