131302442 has 4 divisors (see below), whose sum is σ = 196953666. Its totient is φ = 65651220.

The previous prime is 131302433. The next prime is 131302447. The reversal of 131302442 is 244203131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244203131 = 241 ⋅1013291.

It can be written as a sum of positive squares in only one way, i.e., 109390681 + 21911761 = 10459^2 + 4681^2 .

It is not an unprimeable number, because it can be changed into a prime (131302447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32825609 + ... + 32825612.

Almost surely, 2^131302442 is an apocalyptic number.

131302442 is a deficient number, since it is larger than the sum of its proper divisors (65651224).

131302442 is an equidigital number, since it uses as much as digits as its factorization.

131302442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65651223.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 131302442 is about 11458.7277653324. The cubic root of 131302442 is about 508.2658542935.

Adding to 131302442 its reverse (244203131), we get a palindrome (375505573).

The spelling of 131302442 in words is "one hundred thirty-one million, three hundred two thousand, four hundred forty-two".