131233400323442 has 4 divisors (see below), whose sum is σ = 196850100485166. Its totient is φ = 65616700161720.

The previous prime is 131233400323391. The next prime is 131233400323469. The reversal of 131233400323442 is 244323004332131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 79372935904201 + 51860464419241 = 8909149^2 + 7201421^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32808350080859 + ... + 32808350080862.

Almost surely, 2^{131233400323442} is an apocalyptic number.

131233400323442 is a deficient number, since it is larger than the sum of its proper divisors (65616700161724).

131233400323442 is an equidigital number, since it uses as much as digits as its factorization.

131233400323442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65616700161723.

The product of its (nonzero) digits is 124416, while the sum is 35.

Adding to 131233400323442 its reverse (244323004332131), we get a palindrome (375556404655573).

The spelling of 131233400323442 in words is "one hundred thirty-one trillion, two hundred thirty-three billion, four hundred million, three hundred twenty-three thousand, four hundred forty-two".