131001443 has 4 divisors (see below), whose sum is σ = 135227328. Its totient is φ = 126775560.

The previous prime is 131001433. The next prime is 131001463. The reversal of 131001443 is 344100131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344100131 = 17707 ⋅19433.

It is a cyclic number.

It is not a de Polignac number, because 131001443 - 2⁶ = 131001379 is a prime.

It is a super-2 number, since 2×131001443² = 34322756136164498, which contains 22 as substring.

It is a Duffinian number.

131001443 is a modest number, since divided by 1443 gives 131 as remainder.

It is not an unprimeable number, because it can be changed into a prime (131001433) 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, 2112896 + ... + 2112957.

It is an arithmetic number, because the mean of its divisors is an integer number (33806832).

Almost surely, 2^131001443 is an apocalyptic number.

131001443 is a deficient number, since it is larger than the sum of its proper divisors (4225885).

131001443 is an equidigital number, since it uses as much as digits as its factorization.

131001443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4225884.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 131001443 is about 11445.5861798337. The cubic root of 131001443 is about 507.8771726005.

Adding to 131001443 its reverse (344100131), we get a palindrome (475101574).

The spelling of 131001443 in words is "one hundred thirty-one million, one thousand, four hundred forty-three".