131423534 has 16 divisors (see below), whose sum is σ = 222473520. Its totient is φ = 57677760.

The previous prime is 131423483. The next prime is 131423599. The reversal of 131423534 is 435324131.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 102359 + ... + 103634.

It is an arithmetic number, because the mean of its divisors is an integer number (13904595).

Almost surely, 2^131423534 is an apocalyptic number.

131423534 is a deficient number, since it is larger than the sum of its proper divisors (91049986).

131423534 is a wasteful number, since it uses less digits than its factorization.

131423534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206035.

The product of its digits is 4320, while the sum is 26.

The square root of 131423534 is about 11464.0103803163. The cubic root of 131423534 is about 508.4220535164.

Adding to 131423534 its reverse (435324131), we get a palindrome (566747665).

The spelling of 131423534 in words is "one hundred thirty-one million, four hundred twenty-three thousand, five hundred thirty-four".