131423135 has 4 divisors (see below), whose sum is σ = 157707768. Its totient is φ = 105138504.

The previous prime is 131423111. The next prime is 131423137. The reversal of 131423135 is 531324131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 531324131 = 13 ⋅40871087.

It is a cyclic number.

It is not a de Polignac number, because 131423135 - 2¹⁶ = 131357599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131423135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131423137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13142309 + ... + 13142318.

It is an arithmetic number, because the mean of its divisors is an integer number (39426942).

Almost surely, 2^131423135 is an apocalyptic number.

131423135 is a deficient number, since it is larger than the sum of its proper divisors (26284633).

131423135 is an equidigital number, since it uses as much as digits as its factorization.

131423135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26284632.

The product of its digits is 1080, while the sum is 23.

The square root of 131423135 is about 11463.9929780160. The cubic root of 131423135 is about 508.4215389951.

Adding to 131423135 its reverse (531324131), we get a palindrome (662747266).

The spelling of 131423135 in words is "one hundred thirty-one million, four hundred twenty-three thousand, one hundred thirty-five".