131601443 has 4 divisors (see below), whose sum is σ = 132191808. Its totient is φ = 131011080.

The previous prime is 131601433. The next prime is 131601493. The reversal of 131601443 is 344106131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131601443 - 2⁴ = 131601427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131601413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294848 + ... + 295293.

It is an arithmetic number, because the mean of its divisors is an integer number (33047952).

Almost surely, 2^131601443 is an apocalyptic number.

131601443 is a deficient number, since it is larger than the sum of its proper divisors (590365).

131601443 is an equidigital number, since it uses as much as digits as its factorization.

131601443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590364.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 131601443 is about 11471.7672134680. The cubic root of 131601443 is about 508.6513682910.

Adding to 131601443 its reverse (344106131), we get a palindrome (475707574).

The spelling of 131601443 in words is "one hundred thirty-one million, six hundred one thousand, four hundred forty-three".