131401343 has 4 divisors (see below), whose sum is σ = 135640128. Its totient is φ = 127162560.

The previous prime is 131401339. The next prime is 131401357. The reversal of 131401343 is 343104131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 343104131 = 2161 ⋅158771.

It is a cyclic number.

It is not a de Polignac number, because 131401343 - 2² = 131401339 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131403343) 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, 2119346 + ... + 2119407.

It is an arithmetic number, because the mean of its divisors is an integer number (33910032).

Almost surely, 2^131401343 is an apocalyptic number.

131401343 is a deficient number, since it is larger than the sum of its proper divisors (4238785).

131401343 is an equidigital number, since it uses as much as digits as its factorization.

131401343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4238784.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 131401343 is about 11463.0424844367. The cubic root of 131401343 is about 508.3934360420.

Adding to 131401343 its reverse (343104131), we get a palindrome (474505474).

The spelling of 131401343 in words is "one hundred thirty-one million, four hundred one thousand, three hundred forty-three".