131431242 has 16 divisors (see below), whose sum is σ = 263037600. Its totient is φ = 43781232.

The previous prime is 131431241. The next prime is 131431249. The reversal of 131431242 is 242134131.

It is not an unprimeable number, because it can be changed into a prime (131431241) by changing a digit.

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, 3748 + ... + 16640.

It is an arithmetic number, because the mean of its divisors is an integer number (16439850).

Almost surely, 2^131431242 is an apocalyptic number.

131431242 is an abundant number, since it is smaller than the sum of its proper divisors (131606358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131431242 is a wasteful number, since it uses less digits than its factorization.

131431242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14597.

The product of its digits is 576, while the sum is 21.

The square root of 131431242 is about 11464.3465579160. The cubic root of 131431242 is about 508.4319929858.

Adding to 131431242 its reverse (242134131), we get a palindrome (373565373).

The spelling of 131431242 in words is "one hundred thirty-one million, four hundred thirty-one thousand, two hundred forty-two".