131303643 has 4 divisors (see below), whose sum is σ = 175071528. Its totient is φ = 87535760.

The previous prime is 131303633. The next prime is 131303671. The reversal of 131303643 is 346303131.

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 131303643 - 2¹⁴ = 131287259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131303603) 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, 21883938 + ... + 21883943.

It is an arithmetic number, because the mean of its divisors is an integer number (43767882).

Almost surely, 2^131303643 is an apocalyptic number.

131303643 is a deficient number, since it is larger than the sum of its proper divisors (43767885).

131303643 is an equidigital number, since it uses as much as digits as its factorization.

131303643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43767884.

The product of its (nonzero) digits is 1944, while the sum is 24.

The square root of 131303643 is about 11458.7801706813. The cubic root of 131303643 is about 508.2674039611.

Adding to 131303643 its reverse (346303131), we get a palindrome (477606774).

The spelling of 131303643 in words is "one hundred thirty-one million, three hundred three thousand, six hundred forty-three".