131531943 has 8 divisors (see below), whose sum is σ = 177346800. Its totient is φ = 86702528.

The previous prime is 131531923. The next prime is 131531957. The reversal of 131531943 is 349135131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131531943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131531943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131531923) 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, 246048 + ... + 246581.

It is an arithmetic number, because the mean of its divisors is an integer number (22168350).

Almost surely, 2^131531943 is an apocalyptic number.

131531943 is a deficient number, since it is larger than the sum of its proper divisors (45814857).

131531943 is an equidigital number, since it uses as much as digits as its factorization.

131531943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492721.

The product of its digits is 4860, while the sum is 30.

The square root of 131531943 is about 11468.7376375955. The cubic root of 131531943 is about 508.5618112815.

The spelling of 131531943 in words is "one hundred thirty-one million, five hundred thirty-one thousand, nine hundred forty-three".